20904320

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:475

約数の個数: 64

約数和(自身を含む): 50673600

約数和(自身を除く): 29769280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 356, 367, 445, 640, 712, 734, 890, 1424, 1468, 1780, 1835, 2848, 2936, 3560, 3670, 5696, 5872, 7120, 7340, 11392, 11744, 14240, 14680, 23488, 28480, 29360, 32663, 46976, 56960, 58720, 65326, 117440, 130652, 163315, 234880, 261304, 326630, 522608, 653260, 1045216, 1306520, 2090432, 2613040, 4180864, 5226080, 10452160, 20904320]

約数ペア:

[(1, 20904320), (2, 10452160), (4, 5226080), (5, 4180864), (8, 2613040), (10, 2090432), (16, 1306520), (20, 1045216), (32, 653260), (40, 522608), (64, 326630), (80, 261304), (89, 234880), (128, 163315), (160, 130652), (178, 117440), (320, 65326), (356, 58720), (367, 56960), (445, 46976), (640, 32663), (712, 29360), (734, 28480), (890, 23488), (1424, 14680), (1468, 14240), (1780, 11744), (1835, 11392), (2848, 7340), (2936, 7120), (3560, 5872), (3670, 5696)]