15900920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{521}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 41342400

約数和(自身を除く): 25441480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 521, 545, 763, 872, 1042, 1090, 1526, 2084, 2180, 2605, 3052, 3647, 3815, 4168, 4360, 5210, 6104, 7294, 7630, 10420, 14588, 15260, 18235, 20840, 29176, 30520, 36470, 56789, 72940, 113578, 145880, 227156, 283945, 397523, 454312, 567890, 795046, 1135780, 1590092, 1987615, 2271560, 3180184, 3975230, 7950460, 15900920]

約数ペア:

[(1, 15900920), (2, 7950460), (4, 3975230), (5, 3180184), (7, 2271560), (8, 1987615), (10, 1590092), (14, 1135780), (20, 795046), (28, 567890), (35, 454312), (40, 397523), (56, 283945), (70, 227156), (109, 145880), (140, 113578), (218, 72940), (280, 56789), (436, 36470), (521, 30520), (545, 29176), (763, 20840), (872, 18235), (1042, 15260), (1090, 14588), (1526, 10420), (2084, 7630), (2180, 7294), (2605, 6104), (3052, 5210), (3647, 4360), (3815, 4168)]