21047380

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1\times {\mathrm{139}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 45581760

約数和(自身を除く): 24534380

約数列:

[1, 2, 4, 5, 10, 20, 67, 113, 134, 139, 226, 268, 278, 335, 452, 556, 565, 670, 695, 1130, 1340, 1390, 2260, 2780, 7571, 9313, 15142, 15707, 18626, 30284, 31414, 37252, 37855, 46565, 62828, 75710, 78535, 93130, 151420, 157070, 186260, 314140, 1052369, 2104738, 4209476, 5261845, 10523690, 21047380]

約数ペア:

[(1, 21047380), (2, 10523690), (4, 5261845), (5, 4209476), (10, 2104738), (20, 1052369), (67, 314140), (113, 186260), (134, 157070), (139, 151420), (226, 93130), (268, 78535), (278, 75710), (335, 62828), (452, 46565), (556, 37855), (565, 37252), (670, 31414), (695, 30284), (1130, 18626), (1340, 15707), (1390, 15142), (2260, 9313), (2780, 7571)]