21154980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{241}}^1$

素因数の和:290

約数の個数: 192

約数和(自身を含む): 78059520

約数和(自身を除く): 56904540

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 19, 20, 21, 22, 28, 30, 33, 35, 38, 42, 44, 55, 57, 60, 66, 70, 76, 77, 84, 95, 105, 110, 114, 132, 133, 140, 154, 165, 190, 209, 210, 220, 228, 231, 241, 266, 285, 308, 330, 380, 385, 399, 418, 420, 462, 482, 532, 570, 627, 660, 665, 723, 770, 798, 836, 924, 964, 1045, 1140, 1155, 1205, 1254, 1330, 1446, 1463, 1540, 1596, 1687, 1995, 2090, 2310, 2410, 2508, 2651, 2660, 2892, 2926, 3135, 3374, 3615, 3990, 4180, 4389, 4579, 4620, 4820, 5061, 5302, 5852, 6270, 6748, 7230, 7315, 7953, 7980, 8435, 8778, 9158, 10122, 10604, 12540, 13255, 13737, 14460, 14630, 15906, 16870, 17556, 18316, 18557, 20244, 21945, 22895, 25305, 26510, 27474, 29260, 31812, 32053, 33740, 37114, 39765, 43890, 45790, 50369, 50610, 53020, 54948, 55671, 64106, 68685, 74228, 79530, 87780, 91580, 92785, 96159, 100738, 101220, 111342, 128212, 137370, 151107, 159060, 160265, 185570, 192318, 201476, 222684, 251845, 274740, 278355, 302214, 320530, 352583, 371140, 384636, 480795, 503690, 556710, 604428, 641060, 705166, 755535, 961590, 1007380, 1057749, 1113420, 1410332, 1511070, 1762915, 1923180, 2115498, 3022140, 3525830, 4230996, 5288745, 7051660, 10577490, 21154980]

約数ペア:

[(1, 21154980), (2, 10577490), (3, 7051660), (4, 5288745), (5, 4230996), (6, 3525830), (7, 3022140), (10, 2115498), (11, 1923180), (12, 1762915), (14, 1511070), (15, 1410332), (19, 1113420), (20, 1057749), (21, 1007380), (22, 961590), (28, 755535), (30, 705166), (33, 641060), (35, 604428), (38, 556710), (42, 503690), (44, 480795), (55, 384636), (57, 371140), (60, 352583), (66, 320530), (70, 302214), (76, 278355), (77, 274740), (84, 251845), (95, 222684), (105, 201476), (110, 192318), (114, 185570), (132, 160265), (133, 159060), (140, 151107), (154, 137370), (165, 128212), (190, 111342), (209, 101220), (210, 100738), (220, 96159), (228, 92785), (231, 91580), (241, 87780), (266, 79530), (285, 74228), (308, 68685), (330, 64106), (380, 55671), (385, 54948), (399, 53020), (418, 50610), (420, 50369), (462, 45790), (482, 43890), (532, 39765), (570, 37114), (627, 33740), (660, 32053), (665, 31812), (723, 29260), (770, 27474), (798, 26510), (836, 25305), (924, 22895), (964, 21945), (1045, 20244), (1140, 18557), (1155, 18316), (1205, 17556), (1254, 16870), (1330, 15906), (1446, 14630), (1463, 14460), (1540, 13737), (1596, 13255), (1687, 12540), (1995, 10604), (2090, 10122), (2310, 9158), (2410, 8778), (2508, 8435), (2651, 7980), (2660, 7953), (2892, 7315), (2926, 7230), (3135, 6748), (3374, 6270), (3615, 5852), (3990, 5302), (4180, 5061), (4389, 4820), (4579, 4620)]