21280329

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{2267}}^1$

素因数の和:2429

約数の個数: 24

約数和(自身を含む): 35380800

約数和(自身を除く): 14100471

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 2267, 3129, 6801, 9387, 15869, 20403, 47607, 142821, 337783, 1013349, 2364481, 3040047, 7093443, 21280329]

約数ペア:

[(1, 21280329), (3, 7093443), (7, 3040047), (9, 2364481), (21, 1013349), (63, 337783), (149, 142821), (447, 47607), (1043, 20403), (1341, 15869), (2267, 9387), (3129, 6801)]