20138325

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 35354880

約数和(自身を除く): 15216555

約数列:

[1, 3, 5, 15, 25, 29, 47, 75, 87, 141, 145, 197, 235, 435, 591, 705, 725, 985, 1175, 1363, 2175, 2955, 3525, 4089, 4925, 5713, 6815, 9259, 14775, 17139, 20445, 27777, 28565, 34075, 46295, 85695, 102225, 138885, 142825, 231475, 268511, 428475, 694425, 805533, 1342555, 4027665, 6712775, 20138325]

約数ペア:

[(1, 20138325), (3, 6712775), (5, 4027665), (15, 1342555), (25, 805533), (29, 694425), (47, 428475), (75, 268511), (87, 231475), (141, 142825), (145, 138885), (197, 102225), (235, 85695), (435, 46295), (591, 34075), (705, 28565), (725, 27777), (985, 20445), (1175, 17139), (1363, 14775), (2175, 9259), (2955, 6815), (3525, 5713), (4089, 4925)]