20497905

素因数分解:

$3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{2633}}^1$

素因数の和:2817

約数の個数: 24

約数和(自身を含む): 35748648

約数和(自身を除く): 15250743

約数列:

[1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595, 2633, 7785, 7899, 13165, 23697, 39495, 118485, 455509, 1366527, 2277545, 4099581, 6832635, 20497905]

約数ペア:

[(1, 20497905), (3, 6832635), (5, 4099581), (9, 2277545), (15, 1366527), (45, 455509), (173, 118485), (519, 39495), (865, 23697), (1557, 13165), (2595, 7899), (2633, 7785)]