81715900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1091}}^1$

素因数の和:1219

約数の個数: 72

約数和(自身を含む): 204736896

約数和(自身を除く): 123020996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 107, 140, 175, 214, 350, 428, 535, 700, 749, 1070, 1091, 1498, 2140, 2182, 2675, 2996, 3745, 4364, 5350, 5455, 7490, 7637, 10700, 10910, 14980, 15274, 18725, 21820, 27275, 30548, 37450, 38185, 54550, 74900, 76370, 109100, 116737, 152740, 190925, 233474, 381850, 466948, 583685, 763700, 817159, 1167370, 1634318, 2334740, 2918425, 3268636, 4085795, 5836850, 8171590, 11673700, 16343180, 20428975, 40857950, 81715900]

約数ペア:

[(1, 81715900), (2, 40857950), (4, 20428975), (5, 16343180), (7, 11673700), (10, 8171590), (14, 5836850), (20, 4085795), (25, 3268636), (28, 2918425), (35, 2334740), (50, 1634318), (70, 1167370), (100, 817159), (107, 763700), (140, 583685), (175, 466948), (214, 381850), (350, 233474), (428, 190925), (535, 152740), (700, 116737), (749, 109100), (1070, 76370), (1091, 74900), (1498, 54550), (2140, 38185), (2182, 37450), (2675, 30548), (2996, 27275), (3745, 21820), (4364, 18725), (5350, 15274), (5455, 14980), (7490, 10910), (7637, 10700)]