21505640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41357}}^1$

素因数の和:41381

約数の個数: 32

約数和(自身を含む): 52111080

約数和(自身を除く): 30605440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41357, 82714, 165428, 206785, 330856, 413570, 537641, 827140, 1075282, 1654280, 2150564, 2688205, 4301128, 5376410, 10752820, 21505640]

約数ペア:

[(1, 21505640), (2, 10752820), (4, 5376410), (5, 4301128), (8, 2688205), (10, 2150564), (13, 1654280), (20, 1075282), (26, 827140), (40, 537641), (52, 413570), (65, 330856), (104, 206785), (130, 165428), (260, 82714), (520, 41357)]