19780245

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 16072299

約数列:

[1, 3, 5, 9, 15, 41, 45, 71, 123, 151, 205, 213, 355, 369, 453, 615, 639, 755, 1065, 1359, 1845, 2265, 2911, 3195, 6191, 6795, 8733, 10721, 14555, 18573, 26199, 30955, 32163, 43665, 53605, 55719, 92865, 96489, 130995, 160815, 278595, 439561, 482445, 1318683, 2197805, 3956049, 6593415, 19780245]

約数ペア:

[(1, 19780245), (3, 6593415), (5, 3956049), (9, 2197805), (15, 1318683), (41, 482445), (45, 439561), (71, 278595), (123, 160815), (151, 130995), (205, 96489), (213, 92865), (355, 55719), (369, 53605), (453, 43665), (615, 32163), (639, 30955), (755, 26199), (1065, 18573), (1359, 14555), (1845, 10721), (2265, 8733), (2911, 6795), (3195, 6191)]