641115

素因数分解:

$3^4\times 5^1\times {\mathrm{1583}}^1$

素因数の和:1600

約数の個数: 20

約数和(自身を含む): 1149984

約数和(自身を除く): 508869

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 1583, 4749, 7915, 14247, 23745, 42741, 71235, 128223, 213705, 641115]

約数ペア:

[(1, 641115), (3, 213705), (5, 128223), (9, 71235), (15, 42741), (27, 23745), (45, 14247), (81, 7915), (135, 4749), (405, 1583)]