20987945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{22447}}^1$

素因数の和:22480

約数の個数: 16

約数和(自身を含む): 29092608

約数和(自身を除く): 8104663

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 22447, 112235, 246917, 381599, 1234585, 1907995, 4197589, 20987945]

約数ペア:

[(1, 20987945), (5, 4197589), (11, 1907995), (17, 1234585), (55, 381599), (85, 246917), (187, 112235), (935, 22447)]