19808500

素因数分解:

$2^2\times 5^3\times {\mathrm{173}}^1\times {\mathrm{229}}^1$

素因数の和:421

約数の個数: 48

約数和(自身を含む): 43701840

約数和(自身を除く): 23893340

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 173, 229, 250, 346, 458, 500, 692, 865, 916, 1145, 1730, 2290, 3460, 4325, 4580, 5725, 8650, 11450, 17300, 21625, 22900, 28625, 39617, 43250, 57250, 79234, 86500, 114500, 158468, 198085, 396170, 792340, 990425, 1980850, 3961700, 4952125, 9904250, 19808500]

約数ペア:

[(1, 19808500), (2, 9904250), (4, 4952125), (5, 3961700), (10, 1980850), (20, 990425), (25, 792340), (50, 396170), (100, 198085), (125, 158468), (173, 114500), (229, 86500), (250, 79234), (346, 57250), (458, 43250), (500, 39617), (692, 28625), (865, 22900), (916, 21625), (1145, 17300), (1730, 11450), (2290, 8650), (3460, 5725), (4325, 4580)]