21138988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{10987}}^1$

素因数の和:11041

約数の個数: 24

約数和(自身を含む): 40919312

約数和(自身を除く): 19780324

約数列:

[1, 2, 4, 13, 26, 37, 52, 74, 148, 481, 962, 1924, 10987, 21974, 43948, 142831, 285662, 406519, 571324, 813038, 1626076, 5284747, 10569494, 21138988]

約数ペア:

[(1, 21138988), (2, 10569494), (4, 5284747), (13, 1626076), (26, 813038), (37, 571324), (52, 406519), (74, 285662), (148, 142831), (481, 43948), (962, 21974), (1924, 10987)]