21871460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84121}}^1$

素因数の和:84143

約数の個数: 24

約数和(自身を含む): 49463736

約数和(自身を除く): 27592276

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84121, 168242, 336484, 420605, 841210, 1093573, 1682420, 2187146, 4374292, 5467865, 10935730, 21871460]

約数ペア:

[(1, 21871460), (2, 10935730), (4, 5467865), (5, 4374292), (10, 2187146), (13, 1682420), (20, 1093573), (26, 841210), (52, 420605), (65, 336484), (130, 168242), (260, 84121)]