21995240

素因数分解:

$2^3\times 5^1\times {\mathrm{577}}^1\times {\mathrm{953}}^1$

素因数の和:1541

約数の個数: 32

約数和(自身を含む): 49627080

約数和(自身を除く): 27631840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 577, 953, 1154, 1906, 2308, 2885, 3812, 4616, 4765, 5770, 7624, 9530, 11540, 19060, 23080, 38120, 549881, 1099762, 2199524, 2749405, 4399048, 5498810, 10997620, 21995240]

約数ペア:

[(1, 21995240), (2, 10997620), (4, 5498810), (5, 4399048), (8, 2749405), (10, 2199524), (20, 1099762), (40, 549881), (577, 38120), (953, 23080), (1154, 19060), (1906, 11540), (2308, 9530), (2885, 7624), (3812, 5770), (4616, 4765)]