21816840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{647}}^1$

素因数の和:942

約数の個数: 64

約数和(自身を含む): 65784960

約数和(自身を除く): 43968120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 281, 562, 647, 843, 1124, 1294, 1405, 1686, 1941, 2248, 2588, 2810, 3235, 3372, 3882, 4215, 5176, 5620, 6470, 6744, 7764, 8430, 9705, 11240, 12940, 15528, 16860, 19410, 25880, 33720, 38820, 77640, 181807, 363614, 545421, 727228, 909035, 1090842, 1454456, 1818070, 2181684, 2727105, 3636140, 4363368, 5454210, 7272280, 10908420, 21816840]

約数ペア:

[(1, 21816840), (2, 10908420), (3, 7272280), (4, 5454210), (5, 4363368), (6, 3636140), (8, 2727105), (10, 2181684), (12, 1818070), (15, 1454456), (20, 1090842), (24, 909035), (30, 727228), (40, 545421), (60, 363614), (120, 181807), (281, 77640), (562, 38820), (647, 33720), (843, 25880), (1124, 19410), (1294, 16860), (1405, 15528), (1686, 12940), (1941, 11240), (2248, 9705), (2588, 8430), (2810, 7764), (3235, 6744), (3372, 6470), (3882, 5620), (4215, 5176)]