21281205

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{1277}}^1$

素因数の和:1397

約数の個数: 32

約数和(自身を含む): 37542528

約数和(自身を除く): 16261323

約数列:

[1, 3, 5, 11, 15, 33, 55, 101, 165, 303, 505, 1111, 1277, 1515, 3333, 3831, 5555, 6385, 14047, 16665, 19155, 42141, 70235, 128977, 210705, 386931, 644885, 1418747, 1934655, 4256241, 7093735, 21281205]

約数ペア:

[(1, 21281205), (3, 7093735), (5, 4256241), (11, 1934655), (15, 1418747), (33, 644885), (55, 386931), (101, 210705), (165, 128977), (303, 70235), (505, 42141), (1111, 19155), (1277, 16665), (1515, 14047), (3333, 6385), (3831, 5555)]