20325820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{601}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 45511200

約数和(自身を除く): 25185380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 445, 601, 890, 1202, 1691, 1780, 2404, 3005, 3382, 6010, 6764, 8455, 11419, 12020, 16910, 22838, 33820, 45676, 53489, 57095, 106978, 114190, 213956, 228380, 267445, 534890, 1016291, 1069780, 2032582, 4065164, 5081455, 10162910, 20325820]

約数ペア:

[(1, 20325820), (2, 10162910), (4, 5081455), (5, 4065164), (10, 2032582), (19, 1069780), (20, 1016291), (38, 534890), (76, 267445), (89, 228380), (95, 213956), (178, 114190), (190, 106978), (356, 57095), (380, 53489), (445, 45676), (601, 33820), (890, 22838), (1202, 16910), (1691, 12020), (1780, 11419), (2404, 8455), (3005, 6764), (3382, 6010)]