81982000

素因数分解:

$2^4\times 5^3\times {\mathrm{179}}^1\times {\mathrm{229}}^1$

素因数の和:431

約数の個数: 80

約数和(自身を含む): 200210400

約数和(自身を除く): 118228400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 179, 200, 229, 250, 358, 400, 458, 500, 716, 895, 916, 1000, 1145, 1432, 1790, 1832, 2000, 2290, 2864, 3580, 3664, 4475, 4580, 5725, 7160, 8950, 9160, 11450, 14320, 17900, 18320, 22375, 22900, 28625, 35800, 40991, 44750, 45800, 57250, 71600, 81982, 89500, 91600, 114500, 163964, 179000, 204955, 229000, 327928, 358000, 409910, 458000, 655856, 819820, 1024775, 1639640, 2049550, 3279280, 4099100, 5123875, 8198200, 10247750, 16396400, 20495500, 40991000, 81982000]

約数ペア:

[(1, 81982000), (2, 40991000), (4, 20495500), (5, 16396400), (8, 10247750), (10, 8198200), (16, 5123875), (20, 4099100), (25, 3279280), (40, 2049550), (50, 1639640), (80, 1024775), (100, 819820), (125, 655856), (179, 458000), (200, 409910), (229, 358000), (250, 327928), (358, 229000), (400, 204955), (458, 179000), (500, 163964), (716, 114500), (895, 91600), (916, 89500), (1000, 81982), (1145, 71600), (1432, 57250), (1790, 45800), (1832, 44750), (2000, 40991), (2290, 35800), (2864, 28625), (3580, 22900), (3664, 22375), (4475, 18320), (4580, 17900), (5725, 14320), (7160, 11450), (8950, 9160)]