20952500

素因数分解:

$2^2\times 5^4\times {\mathrm{17}}^2\times {\mathrm{29}}^1$

素因数の和:87

約数の個数: 90

約数和(自身を含む): 50351070

約数和(自身を除く): 29398570

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 29, 34, 50, 58, 68, 85, 100, 116, 125, 145, 170, 250, 289, 290, 340, 425, 493, 500, 578, 580, 625, 725, 850, 986, 1156, 1250, 1445, 1450, 1700, 1972, 2125, 2465, 2500, 2890, 2900, 3625, 4250, 4930, 5780, 7225, 7250, 8381, 8500, 9860, 10625, 12325, 14450, 14500, 16762, 18125, 21250, 24650, 28900, 33524, 36125, 36250, 41905, 42500, 49300, 61625, 72250, 72500, 83810, 123250, 144500, 167620, 180625, 209525, 246500, 308125, 361250, 419050, 616250, 722500, 838100, 1047625, 1232500, 2095250, 4190500, 5238125, 10476250, 20952500]

約数ペア:

[(1, 20952500), (2, 10476250), (4, 5238125), (5, 4190500), (10, 2095250), (17, 1232500), (20, 1047625), (25, 838100), (29, 722500), (34, 616250), (50, 419050), (58, 361250), (68, 308125), (85, 246500), (100, 209525), (116, 180625), (125, 167620), (145, 144500), (170, 123250), (250, 83810), (289, 72500), (290, 72250), (340, 61625), (425, 49300), (493, 42500), (500, 41905), (578, 36250), (580, 36125), (625, 33524), (725, 28900), (850, 24650), (986, 21250), (1156, 18125), (1250, 16762), (1445, 14500), (1450, 14450), (1700, 12325), (1972, 10625), (2125, 9860), (2465, 8500), (2500, 8381), (2890, 7250), (2900, 7225), (3625, 5780), (4250, 4930)]