21277672

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1877}}^1$

素因数の和:2005

約数の個数: 32

約数和(自身を含む): 43381800

約数和(自身を除く): 22104128

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 218, 436, 872, 1417, 1877, 2834, 3754, 5668, 7508, 11336, 15016, 24401, 48802, 97604, 195208, 204593, 409186, 818372, 1636744, 2659709, 5319418, 10638836, 21277672]

約数ペア:

[(1, 21277672), (2, 10638836), (4, 5319418), (8, 2659709), (13, 1636744), (26, 818372), (52, 409186), (104, 204593), (109, 195208), (218, 97604), (436, 48802), (872, 24401), (1417, 15016), (1877, 11336), (2834, 7508), (3754, 5668)]