20449700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1$

素因数の和:309

約数の個数: 72

約数和(自身を含む): 47913600

約数和(自身を除く): 27463900

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 47, 50, 76, 94, 95, 100, 188, 190, 229, 235, 380, 458, 470, 475, 893, 916, 940, 950, 1145, 1175, 1786, 1900, 2290, 2350, 3572, 4351, 4465, 4580, 4700, 5725, 8702, 8930, 10763, 11450, 17404, 17860, 21526, 21755, 22325, 22900, 43052, 43510, 44650, 53815, 87020, 89300, 107630, 108775, 204497, 215260, 217550, 269075, 408994, 435100, 538150, 817988, 1022485, 1076300, 2044970, 4089940, 5112425, 10224850, 20449700]

約数ペア:

[(1, 20449700), (2, 10224850), (4, 5112425), (5, 4089940), (10, 2044970), (19, 1076300), (20, 1022485), (25, 817988), (38, 538150), (47, 435100), (50, 408994), (76, 269075), (94, 217550), (95, 215260), (100, 204497), (188, 108775), (190, 107630), (229, 89300), (235, 87020), (380, 53815), (458, 44650), (470, 43510), (475, 43052), (893, 22900), (916, 22325), (940, 21755), (950, 21526), (1145, 17860), (1175, 17404), (1786, 11450), (1900, 10763), (2290, 8930), (2350, 8702), (3572, 5725), (4351, 4700), (4465, 4580)]