21400431

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{5657}}^1$

素因数の和:5770

約数の個数: 16

約数和(自身を含む): 31051104

約数和(自身を除く): 9650673

約数列:

[1, 3, 13, 39, 97, 291, 1261, 3783, 5657, 16971, 73541, 220623, 548729, 1646187, 7133477, 21400431]

約数ペア:

[(1, 21400431), (3, 7133477), (13, 1646187), (39, 548729), (97, 220623), (291, 73541), (1261, 16971), (3783, 5657)]