21750040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{277}}^1$

素因数の和:452

約数の個数: 64

約数和(自身を含む): 53242560

約数和(自身を除く): 31492520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 151, 260, 277, 302, 520, 554, 604, 755, 1108, 1208, 1385, 1510, 1963, 2216, 2770, 3020, 3601, 3926, 5540, 6040, 7202, 7852, 9815, 11080, 14404, 15704, 18005, 19630, 28808, 36010, 39260, 41827, 72020, 78520, 83654, 144040, 167308, 209135, 334616, 418270, 543751, 836540, 1087502, 1673080, 2175004, 2718755, 4350008, 5437510, 10875020, 21750040]

約数ペア:

[(1, 21750040), (2, 10875020), (4, 5437510), (5, 4350008), (8, 2718755), (10, 2175004), (13, 1673080), (20, 1087502), (26, 836540), (40, 543751), (52, 418270), (65, 334616), (104, 209135), (130, 167308), (151, 144040), (260, 83654), (277, 78520), (302, 72020), (520, 41827), (554, 39260), (604, 36010), (755, 28808), (1108, 19630), (1208, 18005), (1385, 15704), (1510, 14404), (1963, 11080), (2216, 9815), (2770, 7852), (3020, 7202), (3601, 6040), (3926, 5540)]