21387500

素因数分解:

$2^2\times 5^5\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:117

約数の個数: 72

約数和(自身を含む): 49215600

約数和(自身を除く): 27828100

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 59, 100, 116, 118, 125, 145, 236, 250, 290, 295, 500, 580, 590, 625, 725, 1180, 1250, 1450, 1475, 1711, 2500, 2900, 2950, 3125, 3422, 3625, 5900, 6250, 6844, 7250, 7375, 8555, 12500, 14500, 14750, 17110, 18125, 29500, 34220, 36250, 36875, 42775, 72500, 73750, 85550, 90625, 147500, 171100, 181250, 184375, 213875, 362500, 368750, 427750, 737500, 855500, 1069375, 2138750, 4277500, 5346875, 10693750, 21387500]

約数ペア:

[(1, 21387500), (2, 10693750), (4, 5346875), (5, 4277500), (10, 2138750), (20, 1069375), (25, 855500), (29, 737500), (50, 427750), (58, 368750), (59, 362500), (100, 213875), (116, 184375), (118, 181250), (125, 171100), (145, 147500), (236, 90625), (250, 85550), (290, 73750), (295, 72500), (500, 42775), (580, 36875), (590, 36250), (625, 34220), (725, 29500), (1180, 18125), (1250, 17110), (1450, 14750), (1475, 14500), (1711, 12500), (2500, 8555), (2900, 7375), (2950, 7250), (3125, 6844), (3422, 6250), (3625, 5900)]