21037965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 37490112

約数和(自身を除く): 16452147

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 169, 193, 195, 215, 507, 559, 579, 645, 845, 965, 1677, 2509, 2535, 2795, 2895, 7267, 7527, 8299, 8385, 12545, 21801, 24897, 32617, 36335, 37635, 41495, 97851, 107887, 109005, 124485, 163085, 323661, 489255, 539435, 1402531, 1618305, 4207593, 7012655, 21037965]

約数ペア:

[(1, 21037965), (3, 7012655), (5, 4207593), (13, 1618305), (15, 1402531), (39, 539435), (43, 489255), (65, 323661), (129, 163085), (169, 124485), (193, 109005), (195, 107887), (215, 97851), (507, 41495), (559, 37635), (579, 36335), (645, 32617), (845, 24897), (965, 21801), (1677, 12545), (2509, 8385), (2535, 8299), (2795, 7527), (2895, 7267)]