21888346640

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1296703}}^1$

素因数の和:1296927

約数の個数: 40

約数和(自身を含む): 51131632128

約数和(自身を除く): 29243285488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1688, 2110, 3376, 4220, 8440, 16880, 1296703, 2593406, 5186812, 6483515, 10373624, 12967030, 20747248, 25934060, 51868120, 103736240, 273604333, 547208666, 1094417332, 1368021665, 2188834664, 2736043330, 4377669328, 5472086660, 10944173320, 21888346640]

約数ペア:

[(1, 21888346640), (2, 10944173320), (4, 5472086660), (5, 4377669328), (8, 2736043330), (10, 2188834664), (16, 1368021665), (20, 1094417332), (40, 547208666), (80, 273604333), (211, 103736240), (422, 51868120), (844, 25934060), (1055, 20747248), (1688, 12967030), (2110, 10373624), (3376, 6483515), (4220, 5186812), (8440, 2593406), (16880, 1296703)]