19968800

素因数分解:

$2^5\times 5^2\times {\mathrm{109}}^1\times {\mathrm{229}}^1$

素因数の和:358

約数の個数: 72

約数和(自身を含む): 49410900

約数和(自身を除く): 29442100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 109, 160, 200, 218, 229, 400, 436, 458, 545, 800, 872, 916, 1090, 1145, 1744, 1832, 2180, 2290, 2725, 3488, 3664, 4360, 4580, 5450, 5725, 7328, 8720, 9160, 10900, 11450, 17440, 18320, 21800, 22900, 24961, 36640, 43600, 45800, 49922, 87200, 91600, 99844, 124805, 183200, 199688, 249610, 399376, 499220, 624025, 798752, 998440, 1248050, 1996880, 2496100, 3993760, 4992200, 9984400, 19968800]

約数ペア:

[(1, 19968800), (2, 9984400), (4, 4992200), (5, 3993760), (8, 2496100), (10, 1996880), (16, 1248050), (20, 998440), (25, 798752), (32, 624025), (40, 499220), (50, 399376), (80, 249610), (100, 199688), (109, 183200), (160, 124805), (200, 99844), (218, 91600), (229, 87200), (400, 49922), (436, 45800), (458, 43600), (545, 36640), (800, 24961), (872, 22900), (916, 21800), (1090, 18320), (1145, 17440), (1744, 11450), (1832, 10900), (2180, 9160), (2290, 8720), (2725, 7328), (3488, 5725), (3664, 5450), (4360, 4580)]