81465720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{293}}^1\times {\mathrm{331}}^1$

素因数の和:645

約数の個数: 128

約数和(自身を含む): 281111040

約数和(自身を除く): 199645320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 293, 331, 420, 586, 662, 840, 879, 993, 1172, 1324, 1465, 1655, 1758, 1986, 2051, 2317, 2344, 2648, 2930, 3310, 3516, 3972, 4102, 4395, 4634, 4965, 5860, 6153, 6620, 6951, 7032, 7944, 8204, 8790, 9268, 9930, 10255, 11585, 11720, 12306, 13240, 13902, 16408, 17580, 18536, 19860, 20510, 23170, 24612, 27804, 30765, 34755, 35160, 39720, 41020, 46340, 49224, 55608, 61530, 69510, 82040, 92680, 96983, 123060, 139020, 193966, 246120, 278040, 290949, 387932, 484915, 581898, 678881, 775864, 969830, 1163796, 1357762, 1454745, 1939660, 2036643, 2327592, 2715524, 2909490, 3394405, 3879320, 4073286, 5431048, 5818980, 6788810, 8146572, 10183215, 11637960, 13577620, 16293144, 20366430, 27155240, 40732860, 81465720]

約数ペア:

[(1, 81465720), (2, 40732860), (3, 27155240), (4, 20366430), (5, 16293144), (6, 13577620), (7, 11637960), (8, 10183215), (10, 8146572), (12, 6788810), (14, 5818980), (15, 5431048), (20, 4073286), (21, 3879320), (24, 3394405), (28, 2909490), (30, 2715524), (35, 2327592), (40, 2036643), (42, 1939660), (56, 1454745), (60, 1357762), (70, 1163796), (84, 969830), (105, 775864), (120, 678881), (140, 581898), (168, 484915), (210, 387932), (280, 290949), (293, 278040), (331, 246120), (420, 193966), (586, 139020), (662, 123060), (840, 96983), (879, 92680), (993, 82040), (1172, 69510), (1324, 61530), (1465, 55608), (1655, 49224), (1758, 46340), (1986, 41020), (2051, 39720), (2317, 35160), (2344, 34755), (2648, 30765), (2930, 27804), (3310, 24612), (3516, 23170), (3972, 20510), (4102, 19860), (4395, 18536), (4634, 17580), (4965, 16408), (5860, 13902), (6153, 13240), (6620, 12306), (6951, 11720), (7032, 11585), (7944, 10255), (8204, 9930), (8790, 9268)]