21395248

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^2\times {\mathrm{661}}^1$

素因数の和:710

約数の個数: 60

約数和(自身を含む): 50402032

約数和(自身を除く): 29006784

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 112, 119, 136, 238, 272, 289, 476, 578, 661, 952, 1156, 1322, 1904, 2023, 2312, 2644, 4046, 4624, 4627, 5288, 8092, 9254, 10576, 11237, 16184, 18508, 22474, 32368, 37016, 44948, 74032, 78659, 89896, 157318, 179792, 191029, 314636, 382058, 629272, 764116, 1258544, 1337203, 1528232, 2674406, 3056464, 5348812, 10697624, 21395248]

約数ペア:

[(1, 21395248), (2, 10697624), (4, 5348812), (7, 3056464), (8, 2674406), (14, 1528232), (16, 1337203), (17, 1258544), (28, 764116), (34, 629272), (56, 382058), (68, 314636), (112, 191029), (119, 179792), (136, 157318), (238, 89896), (272, 78659), (289, 74032), (476, 44948), (578, 37016), (661, 32368), (952, 22474), (1156, 18508), (1322, 16184), (1904, 11237), (2023, 10576), (2312, 9254), (2644, 8092), (4046, 5288), (4624, 4627)]