21153680

素因数分解:

$2^4\times 5^1\times {\mathrm{281}}^1\times {\mathrm{941}}^1$

素因数の和:1235

約数の個数: 40

約数和(自身を含む): 49409784

約数和(自身を除く): 28256104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 281, 562, 941, 1124, 1405, 1882, 2248, 2810, 3764, 4496, 4705, 5620, 7528, 9410, 11240, 15056, 18820, 22480, 37640, 75280, 264421, 528842, 1057684, 1322105, 2115368, 2644210, 4230736, 5288420, 10576840, 21153680]

約数ペア:

[(1, 21153680), (2, 10576840), (4, 5288420), (5, 4230736), (8, 2644210), (10, 2115368), (16, 1322105), (20, 1057684), (40, 528842), (80, 264421), (281, 75280), (562, 37640), (941, 22480), (1124, 18820), (1405, 15056), (1882, 11240), (2248, 9410), (2810, 7528), (3764, 5620), (4496, 4705)]