19939600

素因数分解:

$2^4\times 5^2\times {\mathrm{79}}^1\times {\mathrm{631}}^1$

素因数の和:728

約数の個数: 60

約数和(自身を含む): 48588160

約数和(自身を除く): 28648560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 79, 80, 100, 158, 200, 316, 395, 400, 631, 632, 790, 1262, 1264, 1580, 1975, 2524, 3155, 3160, 3950, 5048, 6310, 6320, 7900, 10096, 12620, 15775, 15800, 25240, 31550, 31600, 49849, 50480, 63100, 99698, 126200, 199396, 249245, 252400, 398792, 498490, 797584, 996980, 1246225, 1993960, 2492450, 3987920, 4984900, 9969800, 19939600]

約数ペア:

[(1, 19939600), (2, 9969800), (4, 4984900), (5, 3987920), (8, 2492450), (10, 1993960), (16, 1246225), (20, 996980), (25, 797584), (40, 498490), (50, 398792), (79, 252400), (80, 249245), (100, 199396), (158, 126200), (200, 99698), (316, 63100), (395, 50480), (400, 49849), (631, 31600), (632, 31550), (790, 25240), (1262, 15800), (1264, 15775), (1580, 12620), (1975, 10096), (2524, 7900), (3155, 6320), (3160, 6310), (3950, 5048)]