31801840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{521}}^1$

素因数の和:650

約数の個数: 80

約数和(自身を含む): 85440960

約数和(自身を除く): 53639120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 109, 112, 140, 218, 280, 436, 521, 545, 560, 763, 872, 1042, 1090, 1526, 1744, 2084, 2180, 2605, 3052, 3647, 3815, 4168, 4360, 5210, 6104, 7294, 7630, 8336, 8720, 10420, 12208, 14588, 15260, 18235, 20840, 29176, 30520, 36470, 41680, 56789, 58352, 61040, 72940, 113578, 145880, 227156, 283945, 291760, 397523, 454312, 567890, 795046, 908624, 1135780, 1590092, 1987615, 2271560, 3180184, 3975230, 4543120, 6360368, 7950460, 15900920, 31801840]

約数ペア:

[(1, 31801840), (2, 15900920), (4, 7950460), (5, 6360368), (7, 4543120), (8, 3975230), (10, 3180184), (14, 2271560), (16, 1987615), (20, 1590092), (28, 1135780), (35, 908624), (40, 795046), (56, 567890), (70, 454312), (80, 397523), (109, 291760), (112, 283945), (140, 227156), (218, 145880), (280, 113578), (436, 72940), (521, 61040), (545, 58352), (560, 56789), (763, 41680), (872, 36470), (1042, 30520), (1090, 29176), (1526, 20840), (1744, 18235), (2084, 15260), (2180, 14588), (2605, 12208), (3052, 10420), (3647, 8720), (3815, 8336), (4168, 7630), (4360, 7294), (5210, 6104)]