21628575

素因数分解:

$3^2\times 5^2\times {\mathrm{97}}^1\times {\mathrm{991}}^1$

素因数の和:1104

約数の個数: 36

約数和(自身を含む): 39178048

約数和(自身を除く): 17549473

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 97, 225, 291, 485, 873, 991, 1455, 2425, 2973, 4365, 4955, 7275, 8919, 14865, 21825, 24775, 44595, 74325, 96127, 222975, 288381, 480635, 865143, 1441905, 2403175, 4325715, 7209525, 21628575]

約数ペア:

[(1, 21628575), (3, 7209525), (5, 4325715), (9, 2403175), (15, 1441905), (25, 865143), (45, 480635), (75, 288381), (97, 222975), (225, 96127), (291, 74325), (485, 44595), (873, 24775), (991, 21825), (1455, 14865), (2425, 8919), (2973, 7275), (4365, 4955)]