81180020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{66541}}^1$

素因数の和:66611

約数の個数: 24

約数和(自身を含む): 173275368

約数和(自身を除く): 92095348

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 66541, 133082, 266164, 332705, 665410, 1330820, 4059001, 8118002, 16236004, 20295005, 40590010, 81180020]

約数ペア:

[(1, 81180020), (2, 40590010), (4, 20295005), (5, 16236004), (10, 8118002), (20, 4059001), (61, 1330820), (122, 665410), (244, 332705), (305, 266164), (610, 133082), (1220, 66541)]