21399966

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1277}}^1$

素因数の和:1318

約数の個数: 72

約数和(自身を含む): 56819880

約数和(自身を除く): 35419914

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 19, 21, 38, 42, 49, 57, 63, 98, 114, 126, 133, 147, 171, 266, 294, 342, 399, 441, 798, 882, 931, 1197, 1277, 1862, 2394, 2554, 2793, 3831, 5586, 7662, 8379, 8939, 11493, 16758, 17878, 22986, 24263, 26817, 48526, 53634, 62573, 72789, 80451, 125146, 145578, 160902, 169841, 187719, 218367, 339682, 375438, 436734, 509523, 563157, 1019046, 1126314, 1188887, 1528569, 2377774, 3057138, 3566661, 7133322, 10699983, 21399966]

約数ペア:

[(1, 21399966), (2, 10699983), (3, 7133322), (6, 3566661), (7, 3057138), (9, 2377774), (14, 1528569), (18, 1188887), (19, 1126314), (21, 1019046), (38, 563157), (42, 509523), (49, 436734), (57, 375438), (63, 339682), (98, 218367), (114, 187719), (126, 169841), (133, 160902), (147, 145578), (171, 125146), (266, 80451), (294, 72789), (342, 62573), (399, 53634), (441, 48526), (798, 26817), (882, 24263), (931, 22986), (1197, 17878), (1277, 16758), (1862, 11493), (2394, 8939), (2554, 8379), (2793, 7662), (3831, 5586)]