21980830

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{541}}^1$

素因数の和:804

約数の個数: 32

約数和(自身を含む): 42145920

約数和(自身を除く): 20165090

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 239, 478, 541, 1082, 1195, 2390, 2705, 4063, 5410, 8126, 9197, 18394, 20315, 40630, 45985, 91970, 129299, 258598, 646495, 1292990, 2198083, 4396166, 10990415, 21980830]

約数ペア:

[(1, 21980830), (2, 10990415), (5, 4396166), (10, 2198083), (17, 1292990), (34, 646495), (85, 258598), (170, 129299), (239, 91970), (478, 45985), (541, 40630), (1082, 20315), (1195, 18394), (2390, 9197), (2705, 8126), (4063, 5410)]