21857445

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1861}}^1$

素因数の和:1907

約数の個数: 40

約数和(自身を含む): 40554360

約数和(自身を除く): 18696915

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 261, 405, 435, 783, 1305, 1861, 2349, 3915, 5583, 9305, 11745, 16749, 27915, 50247, 53969, 83745, 150741, 161907, 251235, 269845, 485721, 753705, 809535, 1457163, 2428605, 4371489, 7285815, 21857445]

約数ペア:

[(1, 21857445), (3, 7285815), (5, 4371489), (9, 2428605), (15, 1457163), (27, 809535), (29, 753705), (45, 485721), (81, 269845), (87, 251235), (135, 161907), (145, 150741), (261, 83745), (405, 53969), (435, 50247), (783, 27915), (1305, 16749), (1861, 11745), (2349, 9305), (3915, 5583)]