21640490

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127297}}^1$

素因数の和:127321

約数の個数: 16

約数和(自身を含む): 41244552

約数和(自身を除く): 19604062

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 127297, 254594, 636485, 1272970, 2164049, 4328098, 10820245, 21640490]

約数ペア:

[(1, 21640490), (2, 10820245), (5, 4328098), (10, 2164049), (17, 1272970), (34, 636485), (85, 254594), (170, 127297)]