19881940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1627}}^1$

素因数の和:1696

約数の個数: 48

約数和(自身を含む): 45948672

約数和(自身を除く): 26066732

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 188, 235, 260, 470, 611, 940, 1222, 1627, 2444, 3055, 3254, 6110, 6508, 8135, 12220, 16270, 21151, 32540, 42302, 76469, 84604, 105755, 152938, 211510, 305876, 382345, 423020, 764690, 994097, 1529380, 1988194, 3976388, 4970485, 9940970, 19881940]

約数ペア:

[(1, 19881940), (2, 9940970), (4, 4970485), (5, 3976388), (10, 1988194), (13, 1529380), (20, 994097), (26, 764690), (47, 423020), (52, 382345), (65, 305876), (94, 211510), (130, 152938), (188, 105755), (235, 84604), (260, 76469), (470, 42302), (611, 32540), (940, 21151), (1222, 16270), (1627, 12220), (2444, 8135), (3055, 6508), (3254, 6110)]