21491105968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79011419}}^1$

素因数の和:79011444

約数の個数: 20

約数和(自身を含む): 44088372360

約数和(自身を除く): 22597266392

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 79011419, 158022838, 316045676, 632091352, 1264182704, 1343194123, 2686388246, 5372776492, 10745552984, 21491105968]

約数ペア:

[(1, 21491105968), (2, 10745552984), (4, 5372776492), (8, 2686388246), (16, 1343194123), (17, 1264182704), (34, 632091352), (68, 316045676), (136, 158022838), (272, 79011419)]