21278996

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{2357}}^1$

素因数の和:2459

約数の個数: 24

約数和(自身を含む): 38888136

約数和(自身を除く): 17609140

約数列:

[1, 2, 4, 37, 61, 74, 122, 148, 244, 2257, 2357, 4514, 4714, 9028, 9428, 87209, 143777, 174418, 287554, 348836, 575108, 5319749, 10639498, 21278996]

約数ペア:

[(1, 21278996), (2, 10639498), (4, 5319749), (37, 575108), (61, 348836), (74, 287554), (122, 174418), (148, 143777), (244, 87209), (2257, 9428), (2357, 9028), (4514, 4714)]