21000688828

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2683}}^1\times {\mathrm{14713}}^1$

素因数の和:17426

約数の個数: 48

約数和(自身を含む): 44231461120

約数和(自身を除く): 23230772292

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 2683, 5366, 10732, 14713, 18781, 29426, 37562, 50977, 58852, 75124, 101954, 102991, 203908, 205982, 279547, 356839, 411964, 559094, 713678, 1118188, 1427356, 1956829, 3913658, 7827316, 39474979, 78949958, 157899916, 276324853, 552649706, 750024601, 1105299412, 1500049202, 3000098404, 5250172207, 10500344414, 21000688828]

約数ペア:

[(1, 21000688828), (2, 10500344414), (4, 5250172207), (7, 3000098404), (14, 1500049202), (19, 1105299412), (28, 750024601), (38, 552649706), (76, 276324853), (133, 157899916), (266, 78949958), (532, 39474979), (2683, 7827316), (5366, 3913658), (10732, 1956829), (14713, 1427356), (18781, 1118188), (29426, 713678), (37562, 559094), (50977, 411964), (58852, 356839), (75124, 279547), (101954, 205982), (102991, 203908)]