20619400

素因数分解:

$2^3\times 5^2\times {\mathrm{131}}^1\times {\mathrm{787}}^1$

素因数の和:934

約数の個数: 48

約数和(自身を含む): 48367440

約数和(自身を除く): 27748040

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 131, 200, 262, 524, 655, 787, 1048, 1310, 1574, 2620, 3148, 3275, 3935, 5240, 6296, 6550, 7870, 13100, 15740, 19675, 26200, 31480, 39350, 78700, 103097, 157400, 206194, 412388, 515485, 824776, 1030970, 2061940, 2577425, 4123880, 5154850, 10309700, 20619400]

約数ペア:

[(1, 20619400), (2, 10309700), (4, 5154850), (5, 4123880), (8, 2577425), (10, 2061940), (20, 1030970), (25, 824776), (40, 515485), (50, 412388), (100, 206194), (131, 157400), (200, 103097), (262, 78700), (524, 39350), (655, 31480), (787, 26200), (1048, 19675), (1310, 15740), (1574, 13100), (2620, 7870), (3148, 6550), (3275, 6296), (3935, 5240)]