128768420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:369

約数の個数: 96

約数和(自身を含む): 309657600

約数和(自身を除く): 180889180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 79, 110, 124, 155, 158, 220, 239, 310, 316, 341, 395, 478, 620, 682, 790, 869, 956, 1195, 1364, 1580, 1705, 1738, 2390, 2449, 2629, 3410, 3476, 4345, 4780, 4898, 5258, 6820, 7409, 8690, 9796, 10516, 12245, 13145, 14818, 17380, 18881, 24490, 26290, 26939, 29636, 37045, 37762, 48980, 52580, 53878, 74090, 75524, 81499, 94405, 107756, 134695, 148180, 162998, 188810, 207691, 269390, 325996, 377620, 407495, 415382, 538780, 585311, 814990, 830764, 1038455, 1170622, 1629980, 2076910, 2341244, 2926555, 4153820, 5853110, 6438421, 11706220, 12876842, 25753684, 32192105, 64384210, 128768420]

約数ペア:

[(1, 128768420), (2, 64384210), (4, 32192105), (5, 25753684), (10, 12876842), (11, 11706220), (20, 6438421), (22, 5853110), (31, 4153820), (44, 2926555), (55, 2341244), (62, 2076910), (79, 1629980), (110, 1170622), (124, 1038455), (155, 830764), (158, 814990), (220, 585311), (239, 538780), (310, 415382), (316, 407495), (341, 377620), (395, 325996), (478, 269390), (620, 207691), (682, 188810), (790, 162998), (869, 148180), (956, 134695), (1195, 107756), (1364, 94405), (1580, 81499), (1705, 75524), (1738, 74090), (2390, 53878), (2449, 52580), (2629, 48980), (3410, 37762), (3476, 37045), (4345, 29636), (4780, 26939), (4898, 26290), (5258, 24490), (6820, 18881), (7409, 17380), (8690, 14818), (9796, 13145), (10516, 12245)]