21798865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 30067200

約数和(自身を除く): 8268335

約数列:

[1, 5, 11, 29, 55, 79, 145, 173, 319, 395, 865, 869, 1595, 1903, 2291, 4345, 5017, 9515, 11455, 13667, 25085, 25201, 55187, 68335, 126005, 150337, 275935, 396343, 751685, 1981715, 4359773, 21798865]

約数ペア:

[(1, 21798865), (5, 4359773), (11, 1981715), (29, 751685), (55, 396343), (79, 275935), (145, 150337), (173, 126005), (319, 68335), (395, 55187), (865, 25201), (869, 25085), (1595, 13667), (1903, 11455), (2291, 9515), (4345, 5017)]