21978869

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{797}}^1$

素因数の和:940

約数の個数: 16

約数和(自身を含む): 25280640

約数和(自身を除く): 3301771

約数列:

[1, 11, 23, 109, 253, 797, 1199, 2507, 8767, 18331, 27577, 86873, 201641, 955603, 1998079, 21978869]

約数ペア:

[(1, 21978869), (11, 1998079), (23, 955603), (109, 201641), (253, 86873), (797, 27577), (1199, 18331), (2507, 8767)]