21259797

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 32272128

約数和(自身を除く): 11012331

約数列:

[1, 3, 13, 23, 39, 69, 137, 173, 299, 411, 519, 897, 1781, 2249, 3151, 3979, 5343, 6747, 9453, 11937, 23701, 40963, 51727, 71103, 122889, 155181, 308113, 545123, 924339, 1635369, 7086599, 21259797]

約数ペア:

[(1, 21259797), (3, 7086599), (13, 1635369), (23, 924339), (39, 545123), (69, 308113), (137, 155181), (173, 122889), (299, 71103), (411, 51727), (519, 40963), (897, 23701), (1781, 11937), (2249, 9453), (3151, 6747), (3979, 5343)]