20840240

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2927}}^1$

素因数の和:3029

約数の個数: 40

約数和(自身を含む): 49014720

約数和(自身を除く): 28174480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2927, 3560, 5854, 7120, 11708, 14635, 23416, 29270, 46832, 58540, 117080, 234160, 260503, 521006, 1042012, 1302515, 2084024, 2605030, 4168048, 5210060, 10420120, 20840240]

約数ペア:

[(1, 20840240), (2, 10420120), (4, 5210060), (5, 4168048), (8, 2605030), (10, 2084024), (16, 1302515), (20, 1042012), (40, 521006), (80, 260503), (89, 234160), (178, 117080), (356, 58540), (445, 46832), (712, 29270), (890, 23416), (1424, 14635), (1780, 11708), (2927, 7120), (3560, 5854)]