21345885

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1487}}^1$

素因数の和:1538

約数の個数: 48

約数和(自身を含む): 41783040

約数和(自身を除く): 20437155

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 145, 165, 261, 319, 435, 495, 957, 1305, 1487, 1595, 2871, 4461, 4785, 7435, 13383, 14355, 16357, 22305, 43123, 49071, 66915, 81785, 129369, 147213, 215615, 245355, 388107, 474353, 646845, 736065, 1423059, 1940535, 2371765, 4269177, 7115295, 21345885]

約数ペア:

[(1, 21345885), (3, 7115295), (5, 4269177), (9, 2371765), (11, 1940535), (15, 1423059), (29, 736065), (33, 646845), (45, 474353), (55, 388107), (87, 245355), (99, 215615), (145, 147213), (165, 129369), (261, 81785), (319, 66915), (435, 49071), (495, 43123), (957, 22305), (1305, 16357), (1487, 14355), (1595, 13383), (2871, 7435), (4461, 4785)]