400500

素因数分解:

$2^2\times 3^2\times 5^3\times {\mathrm{89}}^1$

素因数の和:114

約数の個数: 72

約数和(自身を含む): 1277640

約数和(自身を除く): 877140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 89, 90, 100, 125, 150, 178, 180, 225, 250, 267, 300, 356, 375, 445, 450, 500, 534, 750, 801, 890, 900, 1068, 1125, 1335, 1500, 1602, 1780, 2225, 2250, 2670, 3204, 4005, 4450, 4500, 5340, 6675, 8010, 8900, 11125, 13350, 16020, 20025, 22250, 26700, 33375, 40050, 44500, 66750, 80100, 100125, 133500, 200250, 400500]

約数ペア:

[(1, 400500), (2, 200250), (3, 133500), (4, 100125), (5, 80100), (6, 66750), (9, 44500), (10, 40050), (12, 33375), (15, 26700), (18, 22250), (20, 20025), (25, 16020), (30, 13350), (36, 11125), (45, 8900), (50, 8010), (60, 6675), (75, 5340), (89, 4500), (90, 4450), (100, 4005), (125, 3204), (150, 2670), (178, 2250), (180, 2225), (225, 1780), (250, 1602), (267, 1500), (300, 1335), (356, 1125), (375, 1068), (445, 900), (450, 890), (500, 801), (534, 750)]