21332870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{971}}^1$

素因数の和:1017

約数の個数: 32

約数和(自身を含む): 41640480

約数和(自身を除く): 20307610

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 971, 1690, 1942, 2197, 4394, 4855, 9710, 10985, 12623, 21970, 25246, 63115, 126230, 164099, 328198, 820495, 1640990, 2133287, 4266574, 10666435, 21332870]

約数ペア:

[(1, 21332870), (2, 10666435), (5, 4266574), (10, 2133287), (13, 1640990), (26, 820495), (65, 328198), (130, 164099), (169, 126230), (338, 63115), (845, 25246), (971, 21970), (1690, 12623), (1942, 10985), (2197, 9710), (4394, 4855)]