21871408

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1481}}^1$

素因数の和:1573

約数の個数: 40

約数和(自身を含む): 46309536

約数和(自身を除く): 24438128

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 104, 142, 208, 284, 568, 923, 1136, 1481, 1846, 2962, 3692, 5924, 7384, 11848, 14768, 19253, 23696, 38506, 77012, 105151, 154024, 210302, 308048, 420604, 841208, 1366963, 1682416, 2733926, 5467852, 10935704, 21871408]

約数ペア:

[(1, 21871408), (2, 10935704), (4, 5467852), (8, 2733926), (13, 1682416), (16, 1366963), (26, 841208), (52, 420604), (71, 308048), (104, 210302), (142, 154024), (208, 105151), (284, 77012), (568, 38506), (923, 23696), (1136, 19253), (1481, 14768), (1846, 11848), (2962, 7384), (3692, 5924)]