21510357

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 11175723

約数列:

[1, 3, 11, 33, 37, 79, 111, 223, 237, 407, 669, 869, 1221, 2453, 2607, 2923, 7359, 8251, 8769, 17617, 24753, 32153, 52851, 90761, 96459, 193787, 272283, 581361, 651829, 1955487, 7170119, 21510357]

約数ペア:

[(1, 21510357), (3, 7170119), (11, 1955487), (33, 651829), (37, 581361), (79, 272283), (111, 193787), (223, 96459), (237, 90761), (407, 52851), (669, 32153), (869, 24753), (1221, 17617), (2453, 8769), (2607, 8251), (2923, 7359)]