21628555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{211}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 29917440

約数和(自身を除く): 8288885

約数列:

[1, 5, 13, 19, 65, 83, 95, 211, 247, 415, 1055, 1079, 1235, 1577, 2743, 4009, 5395, 7885, 13715, 17513, 20045, 20501, 52117, 87565, 102505, 227669, 260585, 332747, 1138345, 1663735, 4325711, 21628555]

約数ペア:

[(1, 21628555), (5, 4325711), (13, 1663735), (19, 1138345), (65, 332747), (83, 260585), (95, 227669), (211, 102505), (247, 87565), (415, 52117), (1055, 20501), (1079, 20045), (1235, 17513), (1577, 13715), (2743, 7885), (4009, 5395)]