81004400

素因数分解:

$2^4\times 5^2\times {\mathrm{313}}^1\times {\mathrm{647}}^1$

素因数の和:978

約数の個数: 60

約数和(自身を含む): 195536592

約数和(自身を除く): 114532192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 313, 400, 626, 647, 1252, 1294, 1565, 2504, 2588, 3130, 3235, 5008, 5176, 6260, 6470, 7825, 10352, 12520, 12940, 15650, 16175, 25040, 25880, 31300, 32350, 51760, 62600, 64700, 125200, 129400, 202511, 258800, 405022, 810044, 1012555, 1620088, 2025110, 3240176, 4050220, 5062775, 8100440, 10125550, 16200880, 20251100, 40502200, 81004400]

約数ペア:

[(1, 81004400), (2, 40502200), (4, 20251100), (5, 16200880), (8, 10125550), (10, 8100440), (16, 5062775), (20, 4050220), (25, 3240176), (40, 2025110), (50, 1620088), (80, 1012555), (100, 810044), (200, 405022), (313, 258800), (400, 202511), (626, 129400), (647, 125200), (1252, 64700), (1294, 62600), (1565, 51760), (2504, 32350), (2588, 31300), (3130, 25880), (3235, 25040), (5008, 16175), (5176, 15650), (6260, 12940), (6470, 12520), (7825, 10352)]