18617680

素因数分解:

$2^4\times 5^1\times {\mathrm{409}}^1\times {\mathrm{569}}^1$

素因数の和:991

約数の個数: 40

約数和(自身を含む): 43468200

約数和(自身を除く): 24850520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 409, 569, 818, 1138, 1636, 2045, 2276, 2845, 3272, 4090, 4552, 5690, 6544, 8180, 9104, 11380, 16360, 22760, 32720, 45520, 232721, 465442, 930884, 1163605, 1861768, 2327210, 3723536, 4654420, 9308840, 18617680]

約数ペア:

[(1, 18617680), (2, 9308840), (4, 4654420), (5, 3723536), (8, 2327210), (10, 1861768), (16, 1163605), (20, 930884), (40, 465442), (80, 232721), (409, 45520), (569, 32720), (818, 22760), (1138, 16360), (1636, 11380), (2045, 9104), (2276, 8180), (2845, 6544), (3272, 5690), (4090, 4552)]