21216986

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{373}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 38776320

約数和(自身を除く): 17559334

約数列:

[1, 2, 7, 14, 17, 34, 119, 238, 239, 373, 478, 746, 1673, 2611, 3346, 4063, 5222, 6341, 8126, 12682, 28441, 44387, 56882, 88774, 89147, 178294, 624029, 1248058, 1515499, 3030998, 10608493, 21216986]

約数ペア:

[(1, 21216986), (2, 10608493), (7, 3030998), (14, 1515499), (17, 1248058), (34, 624029), (119, 178294), (238, 89147), (239, 88774), (373, 56882), (478, 44387), (746, 28441), (1673, 12682), (2611, 8126), (3346, 6341), (4063, 5222)]