81899210

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^2\times {\mathrm{71}}^1$

素因数の和:231

約数の個数: 48

約数和(自身を含む): 156888576

約数和(自身を除く): 74989366

約数列:

[1, 2, 5, 10, 31, 61, 62, 71, 122, 142, 155, 305, 310, 355, 610, 710, 1891, 2201, 3721, 3782, 4331, 4402, 7442, 8662, 9455, 11005, 18605, 18910, 21655, 22010, 37210, 43310, 115351, 134261, 230702, 264191, 268522, 528382, 576755, 671305, 1153510, 1320955, 1342610, 2641910, 8189921, 16379842, 40949605, 81899210]

約数ペア:

[(1, 81899210), (2, 40949605), (5, 16379842), (10, 8189921), (31, 2641910), (61, 1342610), (62, 1320955), (71, 1153510), (122, 671305), (142, 576755), (155, 528382), (305, 268522), (310, 264191), (355, 230702), (610, 134261), (710, 115351), (1891, 43310), (2201, 37210), (3721, 22010), (3782, 21655), (4331, 18910), (4402, 18605), (7442, 11005), (8662, 9455)]