21075705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{2909}}^1$

素因数の和:2950

約数の個数: 48

約数和(自身を含む): 43580160

約数和(自身を除く): 22504455

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 45, 63, 69, 105, 115, 161, 207, 315, 345, 483, 805, 1035, 1449, 2415, 2909, 7245, 8727, 14545, 20363, 26181, 43635, 61089, 66907, 101815, 130905, 183267, 200721, 305445, 334535, 468349, 602163, 916335, 1003605, 1405047, 2341745, 3010815, 4215141, 7025235, 21075705]

約数ペア:

[(1, 21075705), (3, 7025235), (5, 4215141), (7, 3010815), (9, 2341745), (15, 1405047), (21, 1003605), (23, 916335), (35, 602163), (45, 468349), (63, 334535), (69, 305445), (105, 200721), (115, 183267), (161, 130905), (207, 101815), (315, 66907), (345, 61089), (483, 43635), (805, 26181), (1035, 20363), (1449, 14545), (2415, 8727), (2909, 7245)]