21227960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40823}}^1$

素因数の和:40847

約数の個数: 32

約数和(自身を含む): 51438240

約数和(自身を除く): 30210280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40823, 81646, 163292, 204115, 326584, 408230, 530699, 816460, 1061398, 1632920, 2122796, 2653495, 4245592, 5306990, 10613980, 21227960]

約数ペア:

[(1, 21227960), (2, 10613980), (4, 5306990), (5, 4245592), (8, 2653495), (10, 2122796), (13, 1632920), (20, 1061398), (26, 816460), (40, 530699), (52, 408230), (65, 326584), (104, 204115), (130, 163292), (260, 81646), (520, 40823)]