21452080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20627}}^1$

素因数の和:20653

約数の個数: 40

約数和(自身を含む): 53715312

約数和(自身を除く): 32263232

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20627, 41254, 82508, 103135, 165016, 206270, 268151, 330032, 412540, 536302, 825080, 1072604, 1340755, 1650160, 2145208, 2681510, 4290416, 5363020, 10726040, 21452080]

約数ペア:

[(1, 21452080), (2, 10726040), (4, 5363020), (5, 4290416), (8, 2681510), (10, 2145208), (13, 1650160), (16, 1340755), (20, 1072604), (26, 825080), (40, 536302), (52, 412540), (65, 330032), (80, 268151), (104, 206270), (130, 165016), (208, 103135), (260, 82508), (520, 41254), (1040, 20627)]