21813465

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{653}}^1$

素因数の和:809

約数の個数: 32

約数和(自身を含む): 37293696

約数和(自身を除く): 15480231

約数列:

[1, 3, 5, 15, 17, 51, 85, 131, 255, 393, 653, 655, 1959, 1965, 2227, 3265, 6681, 9795, 11101, 11135, 33303, 33405, 55505, 85543, 166515, 256629, 427715, 1283145, 1454231, 4362693, 7271155, 21813465]

約数ペア:

[(1, 21813465), (3, 7271155), (5, 4362693), (15, 1454231), (17, 1283145), (51, 427715), (85, 256629), (131, 166515), (255, 85543), (393, 55505), (653, 33405), (655, 33303), (1959, 11135), (1965, 11101), (2227, 9795), (3265, 6681)]