18819820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{389}}^1$

素因数の和:498

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 22457780

約数列:

[1, 2, 4, 5, 10, 20, 41, 59, 82, 118, 164, 205, 236, 295, 389, 410, 590, 778, 820, 1180, 1556, 1945, 2419, 3890, 4838, 7780, 9676, 12095, 15949, 22951, 24190, 31898, 45902, 48380, 63796, 79745, 91804, 114755, 159490, 229510, 318980, 459020, 940991, 1881982, 3763964, 4704955, 9409910, 18819820]

約数ペア:

[(1, 18819820), (2, 9409910), (4, 4704955), (5, 3763964), (10, 1881982), (20, 940991), (41, 459020), (59, 318980), (82, 229510), (118, 159490), (164, 114755), (205, 91804), (236, 79745), (295, 63796), (389, 48380), (410, 45902), (590, 31898), (778, 24190), (820, 22951), (1180, 15949), (1556, 12095), (1945, 9676), (2419, 7780), (3890, 4838)]