20921968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{76919}}^1$

素因数の和:76944

約数の個数: 20

約数和(自身を含む): 42921360

約数和(自身を除く): 21999392

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 76919, 153838, 307676, 615352, 1230704, 1307623, 2615246, 5230492, 10460984, 20921968]

約数ペア:

[(1, 20921968), (2, 10460984), (4, 5230492), (8, 2615246), (16, 1307623), (17, 1230704), (34, 615352), (68, 307676), (136, 153838), (272, 76919)]