21663855

素因数分解:

$3^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{359}}^1$

素因数の和:525

約数の個数: 40

約数和(自身を含む): 39204000

約数和(自身を除く): 17540145

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 149, 359, 405, 447, 745, 1077, 1341, 1795, 2235, 3231, 4023, 5385, 6705, 9693, 12069, 16155, 20115, 29079, 48465, 53491, 60345, 145395, 160473, 267455, 481419, 802365, 1444257, 2407095, 4332771, 7221285, 21663855]

約数ペア:

[(1, 21663855), (3, 7221285), (5, 4332771), (9, 2407095), (15, 1444257), (27, 802365), (45, 481419), (81, 267455), (135, 160473), (149, 145395), (359, 60345), (405, 53491), (447, 48465), (745, 29079), (1077, 20115), (1341, 16155), (1795, 12069), (2235, 9693), (3231, 6705), (4023, 5385)]