64520440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{397}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 154742400

約数和(自身を除く): 90221960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 239, 340, 397, 478, 680, 794, 956, 1195, 1588, 1912, 1985, 2390, 3176, 3970, 4063, 4780, 6749, 7940, 8126, 9560, 13498, 15880, 16252, 20315, 26996, 32504, 33745, 40630, 53992, 67490, 81260, 94883, 134980, 162520, 189766, 269960, 379532, 474415, 759064, 948830, 1613011, 1897660, 3226022, 3795320, 6452044, 8065055, 12904088, 16130110, 32260220, 64520440]

約数ペア:

[(1, 64520440), (2, 32260220), (4, 16130110), (5, 12904088), (8, 8065055), (10, 6452044), (17, 3795320), (20, 3226022), (34, 1897660), (40, 1613011), (68, 948830), (85, 759064), (136, 474415), (170, 379532), (239, 269960), (340, 189766), (397, 162520), (478, 134980), (680, 94883), (794, 81260), (956, 67490), (1195, 53992), (1588, 40630), (1912, 33745), (1985, 32504), (2390, 26996), (3176, 20315), (3970, 16252), (4063, 15880), (4780, 13498), (6749, 9560), (7940, 8126)]