21528195

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{977}}^1$

素因数の和:1111

約数の個数: 32

約数和(自身を含む): 37461312

約数和(自身を除く): 15933117

約数列:

[1, 3, 5, 13, 15, 39, 65, 113, 195, 339, 565, 977, 1469, 1695, 2931, 4407, 4885, 7345, 12701, 14655, 22035, 38103, 63505, 110401, 190515, 331203, 552005, 1435213, 1656015, 4305639, 7176065, 21528195]

約数ペア:

[(1, 21528195), (3, 7176065), (5, 4305639), (13, 1656015), (15, 1435213), (39, 552005), (65, 331203), (113, 190515), (195, 110401), (339, 63505), (565, 38103), (977, 22035), (1469, 14655), (1695, 12701), (2931, 7345), (4407, 4885)]