21897005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10867}}^1$

素因数の和:10916

約数の個数: 16

約数和(自身を含む): 29213184

約数和(自身を除く): 7316179

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10867, 54335, 141271, 336877, 706355, 1684385, 4379401, 21897005]

約数ペア:

[(1, 21897005), (5, 4379401), (13, 1684385), (31, 706355), (65, 336877), (155, 141271), (403, 54335), (2015, 10867)]