21161085

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 37920960

約数和(自身を除く): 16759875

約数列:

[1, 3, 5, 11, 15, 33, 55, 89, 121, 131, 165, 267, 363, 393, 445, 605, 655, 979, 1335, 1441, 1815, 1965, 2937, 4323, 4895, 7205, 10769, 11659, 14685, 15851, 21615, 32307, 34977, 47553, 53845, 58295, 79255, 128249, 161535, 174885, 237765, 384747, 641245, 1410739, 1923735, 4232217, 7053695, 21161085]

約数ペア:

[(1, 21161085), (3, 7053695), (5, 4232217), (11, 1923735), (15, 1410739), (33, 641245), (55, 384747), (89, 237765), (121, 174885), (131, 161535), (165, 128249), (267, 79255), (363, 58295), (393, 53845), (445, 47553), (605, 34977), (655, 32307), (979, 21615), (1335, 15851), (1441, 14685), (1815, 11659), (1965, 10769), (2937, 7205), (4323, 4895)]