20495500

素因数分解:

$2^2\times 5^3\times {\mathrm{179}}^1\times {\mathrm{229}}^1$

素因数の和:427

約数の個数: 48

約数和(自身を含む): 45208800

約数和(自身を除く): 24713300

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 179, 229, 250, 358, 458, 500, 716, 895, 916, 1145, 1790, 2290, 3580, 4475, 4580, 5725, 8950, 11450, 17900, 22375, 22900, 28625, 40991, 44750, 57250, 81982, 89500, 114500, 163964, 204955, 409910, 819820, 1024775, 2049550, 4099100, 5123875, 10247750, 20495500]

約数ペア:

[(1, 20495500), (2, 10247750), (4, 5123875), (5, 4099100), (10, 2049550), (20, 1024775), (25, 819820), (50, 409910), (100, 204955), (125, 163964), (179, 114500), (229, 89500), (250, 81982), (358, 57250), (458, 44750), (500, 40991), (716, 28625), (895, 22900), (916, 22375), (1145, 17900), (1790, 11450), (2290, 8950), (3580, 5725), (4475, 4580)]