21007515

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{20903}}^1$

素因数の和:20978

約数の個数: 16

約数和(自身を含む): 34115328

約数和(自身を除く): 13107813

約数列:

[1, 3, 5, 15, 67, 201, 335, 1005, 20903, 62709, 104515, 313545, 1400501, 4201503, 7002505, 21007515]

約数ペア:

[(1, 21007515), (3, 7002505), (5, 4201503), (15, 1400501), (67, 313545), (201, 104515), (335, 62709), (1005, 20903)]