21443420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15101}}^1$

素因数の和:15181

約数の個数: 24

約数和(自身を含む): 45668448

約数和(自身を除く): 24225028

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15101, 30202, 60404, 75505, 151010, 302020, 1072171, 2144342, 4288684, 5360855, 10721710, 21443420]

約数ペア:

[(1, 21443420), (2, 10721710), (4, 5360855), (5, 4288684), (10, 2144342), (20, 1072171), (71, 302020), (142, 151010), (284, 75505), (355, 60404), (710, 30202), (1420, 15101)]