21115088

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{521}}^1$

素因数の和:695

約数の個数: 40

約数和(自身を含む): 43691400

約数和(自身を除く): 22576312

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 149, 272, 298, 521, 596, 1042, 1192, 2084, 2384, 2533, 4168, 5066, 8336, 8857, 10132, 17714, 20264, 35428, 40528, 70856, 77629, 141712, 155258, 310516, 621032, 1242064, 1319693, 2639386, 5278772, 10557544, 21115088]

約数ペア:

[(1, 21115088), (2, 10557544), (4, 5278772), (8, 2639386), (16, 1319693), (17, 1242064), (34, 621032), (68, 310516), (136, 155258), (149, 141712), (272, 77629), (298, 70856), (521, 40528), (596, 35428), (1042, 20264), (1192, 17714), (2084, 10132), (2384, 8857), (2533, 8336), (4168, 5066)]