20749235

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{317}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 28848960

約数和(自身を除く): 8099725

約数列:

[1, 5, 13, 19, 53, 65, 95, 247, 265, 317, 689, 1007, 1235, 1585, 3445, 4121, 5035, 6023, 13091, 16801, 20605, 30115, 65455, 78299, 84005, 218413, 319219, 391495, 1092065, 1596095, 4149847, 20749235]

約数ペア:

[(1, 20749235), (5, 4149847), (13, 1596095), (19, 1092065), (53, 391495), (65, 319219), (95, 218413), (247, 84005), (265, 78299), (317, 65455), (689, 30115), (1007, 20605), (1235, 16801), (1585, 13091), (3445, 6023), (4121, 5035)]