21395220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{421}}^1$

素因数の和:462

約数の個数: 144

約数和(自身を含む): 75433344

約数和(自身を除く): 54038124

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 55, 60, 66, 70, 77, 84, 105, 110, 121, 132, 140, 154, 165, 210, 220, 231, 242, 308, 330, 363, 385, 420, 421, 462, 484, 605, 660, 726, 770, 842, 847, 924, 1155, 1210, 1263, 1452, 1540, 1684, 1694, 1815, 2105, 2310, 2420, 2526, 2541, 2947, 3388, 3630, 4210, 4235, 4620, 4631, 5052, 5082, 5894, 6315, 7260, 8420, 8470, 8841, 9262, 10164, 11788, 12630, 12705, 13893, 14735, 16940, 17682, 18524, 23155, 25260, 25410, 27786, 29470, 32417, 35364, 44205, 46310, 50820, 50941, 55572, 58940, 64834, 69465, 88410, 92620, 97251, 101882, 129668, 138930, 152823, 162085, 176820, 194502, 203764, 254705, 277860, 305646, 324170, 356587, 389004, 486255, 509410, 611292, 648340, 713174, 764115, 972510, 1018820, 1069761, 1426348, 1528230, 1782935, 1945020, 2139522, 3056460, 3565870, 4279044, 5348805, 7131740, 10697610, 21395220]

約数ペア:

[(1, 21395220), (2, 10697610), (3, 7131740), (4, 5348805), (5, 4279044), (6, 3565870), (7, 3056460), (10, 2139522), (11, 1945020), (12, 1782935), (14, 1528230), (15, 1426348), (20, 1069761), (21, 1018820), (22, 972510), (28, 764115), (30, 713174), (33, 648340), (35, 611292), (42, 509410), (44, 486255), (55, 389004), (60, 356587), (66, 324170), (70, 305646), (77, 277860), (84, 254705), (105, 203764), (110, 194502), (121, 176820), (132, 162085), (140, 152823), (154, 138930), (165, 129668), (210, 101882), (220, 97251), (231, 92620), (242, 88410), (308, 69465), (330, 64834), (363, 58940), (385, 55572), (420, 50941), (421, 50820), (462, 46310), (484, 44205), (605, 35364), (660, 32417), (726, 29470), (770, 27786), (842, 25410), (847, 25260), (924, 23155), (1155, 18524), (1210, 17682), (1263, 16940), (1452, 14735), (1540, 13893), (1684, 12705), (1694, 12630), (1815, 11788), (2105, 10164), (2310, 9262), (2420, 8841), (2526, 8470), (2541, 8420), (2947, 7260), (3388, 6315), (3630, 5894), (4210, 5082), (4235, 5052), (4620, 4631)]