21069776

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{499}}^1$

素因数の和:556

約数の個数: 80

約数和(自身を含む): 52080000

約数和(自身を除く): 31010224

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 29, 52, 56, 58, 91, 104, 112, 116, 182, 203, 208, 232, 364, 377, 406, 464, 499, 728, 754, 812, 998, 1456, 1508, 1624, 1996, 2639, 3016, 3248, 3493, 3992, 5278, 6032, 6487, 6986, 7984, 10556, 12974, 13972, 14471, 21112, 25948, 27944, 28942, 42224, 45409, 51896, 55888, 57884, 90818, 101297, 103792, 115768, 181636, 188123, 202594, 231536, 363272, 376246, 405188, 726544, 752492, 810376, 1316861, 1504984, 1620752, 2633722, 3009968, 5267444, 10534888, 21069776]

約数ペア:

[(1, 21069776), (2, 10534888), (4, 5267444), (7, 3009968), (8, 2633722), (13, 1620752), (14, 1504984), (16, 1316861), (26, 810376), (28, 752492), (29, 726544), (52, 405188), (56, 376246), (58, 363272), (91, 231536), (104, 202594), (112, 188123), (116, 181636), (182, 115768), (203, 103792), (208, 101297), (232, 90818), (364, 57884), (377, 55888), (406, 51896), (464, 45409), (499, 42224), (728, 28942), (754, 27944), (812, 25948), (998, 21112), (1456, 14471), (1508, 13972), (1624, 12974), (1996, 10556), (2639, 7984), (3016, 6986), (3248, 6487), (3493, 6032), (3992, 5278)]