20668400

素因数分解:

$2^4\times 5^2\times {\mathrm{163}}^1\times {\mathrm{317}}^1$

素因数の和:498

約数の個数: 60

約数和(自身を含む): 50118072

約数和(自身を除く): 29449672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 163, 200, 317, 326, 400, 634, 652, 815, 1268, 1304, 1585, 1630, 2536, 2608, 3170, 3260, 4075, 5072, 6340, 6520, 7925, 8150, 12680, 13040, 15850, 16300, 25360, 31700, 32600, 51671, 63400, 65200, 103342, 126800, 206684, 258355, 413368, 516710, 826736, 1033420, 1291775, 2066840, 2583550, 4133680, 5167100, 10334200, 20668400]

約数ペア:

[(1, 20668400), (2, 10334200), (4, 5167100), (5, 4133680), (8, 2583550), (10, 2066840), (16, 1291775), (20, 1033420), (25, 826736), (40, 516710), (50, 413368), (80, 258355), (100, 206684), (163, 126800), (200, 103342), (317, 65200), (326, 63400), (400, 51671), (634, 32600), (652, 31700), (815, 25360), (1268, 16300), (1304, 15850), (1585, 13040), (1630, 12680), (2536, 8150), (2608, 7925), (3170, 6520), (3260, 6340), (4075, 5072)]