21072129

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{859}}^1$

素因数の和:929

約数の個数: 32

約数和(自身を含む): 32941440

約数和(自身を除く): 11869311

約数列:

[1, 3, 13, 17, 37, 39, 51, 111, 221, 481, 629, 663, 859, 1443, 1887, 2577, 8177, 11167, 14603, 24531, 31783, 33501, 43809, 95349, 189839, 413179, 540311, 569517, 1239537, 1620933, 7024043, 21072129]

約数ペア:

[(1, 21072129), (3, 7024043), (13, 1620933), (17, 1239537), (37, 569517), (39, 540311), (51, 413179), (111, 189839), (221, 95349), (481, 43809), (629, 33501), (663, 31783), (859, 24531), (1443, 14603), (1887, 11167), (2577, 8177)]