20721501

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5443}}^1$

素因数の和:5502

約数の個数: 20

約数和(自身を含む): 31618752

約数和(自身を除く): 10897251

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5443, 16329, 48987, 146961, 255821, 440883, 767463, 2302389, 6907167, 20721501]

約数ペア:

[(1, 20721501), (3, 6907167), (9, 2302389), (27, 767463), (47, 440883), (81, 255821), (141, 146961), (423, 48987), (1269, 16329), (3807, 5443)]