21751390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{479}}^1$

素因数の和:744

約数の個数: 32

約数和(自身を含む): 41472000

約数和(自身を除く): 19720610

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 239, 478, 479, 958, 1195, 2390, 2395, 4541, 4790, 9082, 9101, 18202, 22705, 45410, 45505, 91010, 114481, 228962, 572405, 1144810, 2175139, 4350278, 10875695, 21751390]

約数ペア:

[(1, 21751390), (2, 10875695), (5, 4350278), (10, 2175139), (19, 1144810), (38, 572405), (95, 228962), (190, 114481), (239, 91010), (478, 45505), (479, 45410), (958, 22705), (1195, 18202), (2390, 9101), (2395, 9082), (4541, 4790)]