21132405

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{919}}^1$

素因数の和:1010

約数の個数: 48

約数和(自身を含む): 42481920

約数和(自身を除く): 21349515

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 73, 105, 219, 315, 365, 511, 657, 919, 1095, 1533, 2555, 2757, 3285, 4595, 4599, 6433, 7665, 8271, 13785, 19299, 22995, 32165, 41355, 57897, 67087, 96495, 201261, 289485, 335435, 469609, 603783, 1006305, 1408827, 2348045, 3018915, 4226481, 7044135, 21132405]

約数ペア:

[(1, 21132405), (3, 7044135), (5, 4226481), (7, 3018915), (9, 2348045), (15, 1408827), (21, 1006305), (35, 603783), (45, 469609), (63, 335435), (73, 289485), (105, 201261), (219, 96495), (315, 67087), (365, 57897), (511, 41355), (657, 32165), (919, 22995), (1095, 19299), (1533, 13785), (2555, 8271), (2757, 7665), (3285, 6433), (4595, 4599)]