20913405

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 34525440

約数和(自身を除く): 13612035

約数列:

[1, 3, 5, 15, 71, 73, 213, 219, 269, 355, 365, 807, 1065, 1095, 1345, 4035, 5183, 15549, 19099, 19637, 25915, 57297, 58911, 77745, 95495, 98185, 286485, 294555, 1394227, 4182681, 6971135, 20913405]

約数ペア:

[(1, 20913405), (3, 6971135), (5, 4182681), (15, 1394227), (71, 294555), (73, 286485), (213, 98185), (219, 95495), (269, 77745), (355, 58911), (365, 57297), (807, 25915), (1065, 19637), (1095, 19099), (1345, 15549), (4035, 5183)]