21019984

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42379}}^1$

素因数の和:42418

約数の個数: 20

約数和(自身を含む): 42040960

約数和(自身を除く): 21020976

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42379, 84758, 169516, 339032, 678064, 1313749, 2627498, 5254996, 10509992, 21019984]

約数ペア:

[(1, 21019984), (2, 10509992), (4, 5254996), (8, 2627498), (16, 1313749), (31, 678064), (62, 339032), (124, 169516), (248, 84758), (496, 42379)]