81017580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1621}}^1$

素因数の和:1664

約数の個数: 144

約数和(自身を含む): 279580896

約数和(自身を除く): 198563316

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 49, 51, 60, 68, 70, 84, 85, 98, 102, 105, 119, 140, 147, 170, 196, 204, 210, 238, 245, 255, 294, 340, 357, 420, 476, 490, 510, 588, 595, 714, 735, 833, 980, 1020, 1190, 1428, 1470, 1621, 1666, 1785, 2380, 2499, 2940, 3242, 3332, 3570, 4165, 4863, 4998, 6484, 7140, 8105, 8330, 9726, 9996, 11347, 12495, 16210, 16660, 19452, 22694, 24315, 24990, 27557, 32420, 34041, 45388, 48630, 49980, 55114, 56735, 68082, 79429, 82671, 97260, 110228, 113470, 136164, 137785, 158858, 165342, 170205, 192899, 226940, 238287, 275570, 317716, 330684, 340410, 385798, 397145, 413355, 476574, 551140, 578697, 680820, 771596, 794290, 826710, 953148, 964495, 1157394, 1191435, 1350293, 1588580, 1653420, 1928990, 2314788, 2382870, 2700586, 2893485, 3857980, 4050879, 4765740, 5401172, 5786970, 6751465, 8101758, 11573940, 13502930, 16203516, 20254395, 27005860, 40508790, 81017580]

約数ペア:

[(1, 81017580), (2, 40508790), (3, 27005860), (4, 20254395), (5, 16203516), (6, 13502930), (7, 11573940), (10, 8101758), (12, 6751465), (14, 5786970), (15, 5401172), (17, 4765740), (20, 4050879), (21, 3857980), (28, 2893485), (30, 2700586), (34, 2382870), (35, 2314788), (42, 1928990), (49, 1653420), (51, 1588580), (60, 1350293), (68, 1191435), (70, 1157394), (84, 964495), (85, 953148), (98, 826710), (102, 794290), (105, 771596), (119, 680820), (140, 578697), (147, 551140), (170, 476574), (196, 413355), (204, 397145), (210, 385798), (238, 340410), (245, 330684), (255, 317716), (294, 275570), (340, 238287), (357, 226940), (420, 192899), (476, 170205), (490, 165342), (510, 158858), (588, 137785), (595, 136164), (714, 113470), (735, 110228), (833, 97260), (980, 82671), (1020, 79429), (1190, 68082), (1428, 56735), (1470, 55114), (1621, 49980), (1666, 48630), (1785, 45388), (2380, 34041), (2499, 32420), (2940, 27557), (3242, 24990), (3332, 24315), (3570, 22694), (4165, 19452), (4863, 16660), (4998, 16210), (6484, 12495), (7140, 11347), (8105, 9996), (8330, 9726)]