20050420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1151}}^1$

素因数の和:1240

約数の個数: 48

約数和(自身を含む): 46061568

約数和(自身を除く): 26011148

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1151, 1340, 1742, 2302, 3484, 4355, 4604, 5755, 8710, 11510, 14963, 17420, 23020, 29926, 59852, 74815, 77117, 149630, 154234, 299260, 308468, 385585, 771170, 1002521, 1542340, 2005042, 4010084, 5012605, 10025210, 20050420]

約数ペア:

[(1, 20050420), (2, 10025210), (4, 5012605), (5, 4010084), (10, 2005042), (13, 1542340), (20, 1002521), (26, 771170), (52, 385585), (65, 308468), (67, 299260), (130, 154234), (134, 149630), (260, 77117), (268, 74815), (335, 59852), (670, 29926), (871, 23020), (1151, 17420), (1340, 14963), (1742, 11510), (2302, 8710), (3484, 5755), (4355, 4604)]