18618640

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1103}}^1$

素因数の和:1327

約数の個数: 40

約数和(自身を含む): 43532928

約数和(自身を除く): 24914288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1103, 1688, 2110, 2206, 3376, 4220, 4412, 5515, 8440, 8824, 11030, 16880, 17648, 22060, 44120, 88240, 232733, 465466, 930932, 1163665, 1861864, 2327330, 3723728, 4654660, 9309320, 18618640]

約数ペア:

[(1, 18618640), (2, 9309320), (4, 4654660), (5, 3723728), (8, 2327330), (10, 1861864), (16, 1163665), (20, 930932), (40, 465466), (80, 232733), (211, 88240), (422, 44120), (844, 22060), (1055, 17648), (1103, 16880), (1688, 11030), (2110, 8824), (2206, 8440), (3376, 5515), (4220, 4412)]