21091140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{881}}^1$

素因数の和:922

約数の個数: 144

約数和(自身を含む): 77051520

約数和(自身を除く): 55960380

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 57, 60, 63, 70, 76, 84, 90, 95, 105, 114, 126, 133, 140, 171, 180, 190, 210, 228, 252, 266, 285, 315, 342, 380, 399, 420, 532, 570, 630, 665, 684, 798, 855, 881, 1140, 1197, 1260, 1330, 1596, 1710, 1762, 1995, 2394, 2643, 2660, 3420, 3524, 3990, 4405, 4788, 5286, 5985, 6167, 7929, 7980, 8810, 10572, 11970, 12334, 13215, 15858, 16739, 17620, 18501, 23940, 24668, 26430, 30835, 31716, 33478, 37002, 39645, 50217, 52860, 55503, 61670, 66956, 74004, 79290, 83695, 92505, 100434, 111006, 117173, 123340, 150651, 158580, 167390, 185010, 200868, 222012, 234346, 251085, 277515, 301302, 334780, 351519, 370020, 468692, 502170, 555030, 585865, 602604, 703038, 753255, 1004340, 1054557, 1110060, 1171730, 1406076, 1506510, 1757595, 2109114, 2343460, 3013020, 3515190, 4218228, 5272785, 7030380, 10545570, 21091140]

約数ペア:

[(1, 21091140), (2, 10545570), (3, 7030380), (4, 5272785), (5, 4218228), (6, 3515190), (7, 3013020), (9, 2343460), (10, 2109114), (12, 1757595), (14, 1506510), (15, 1406076), (18, 1171730), (19, 1110060), (20, 1054557), (21, 1004340), (28, 753255), (30, 703038), (35, 602604), (36, 585865), (38, 555030), (42, 502170), (45, 468692), (57, 370020), (60, 351519), (63, 334780), (70, 301302), (76, 277515), (84, 251085), (90, 234346), (95, 222012), (105, 200868), (114, 185010), (126, 167390), (133, 158580), (140, 150651), (171, 123340), (180, 117173), (190, 111006), (210, 100434), (228, 92505), (252, 83695), (266, 79290), (285, 74004), (315, 66956), (342, 61670), (380, 55503), (399, 52860), (420, 50217), (532, 39645), (570, 37002), (630, 33478), (665, 31716), (684, 30835), (798, 26430), (855, 24668), (881, 23940), (1140, 18501), (1197, 17620), (1260, 16739), (1330, 15858), (1596, 13215), (1710, 12334), (1762, 11970), (1995, 10572), (2394, 8810), (2643, 7980), (2660, 7929), (3420, 6167), (3524, 5985), (3990, 5286), (4405, 4788)]