21270495

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{307}}^1$

素因数の和:495

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 14211105

約数列:

[1, 3, 5, 15, 31, 93, 149, 155, 307, 447, 465, 745, 921, 1535, 2235, 4605, 4619, 9517, 13857, 23095, 28551, 45743, 47585, 69285, 137229, 142755, 228715, 686145, 1418033, 4254099, 7090165, 21270495]

約数ペア:

[(1, 21270495), (3, 7090165), (5, 4254099), (15, 1418033), (31, 686145), (93, 228715), (149, 142755), (155, 137229), (307, 69285), (447, 47585), (465, 45743), (745, 28551), (921, 23095), (1535, 13857), (2235, 9517), (4605, 4619)]