21246080

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{373}}^1$

素因数の和:481

約数の個数: 64

約数和(自身を含む): 51499800

約数和(自身を除く): 30253720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 356, 373, 445, 640, 712, 746, 890, 1424, 1492, 1780, 1865, 2848, 2984, 3560, 3730, 5696, 5968, 7120, 7460, 11392, 11936, 14240, 14920, 23872, 28480, 29840, 33197, 47744, 56960, 59680, 66394, 119360, 132788, 165985, 238720, 265576, 331970, 531152, 663940, 1062304, 1327880, 2124608, 2655760, 4249216, 5311520, 10623040, 21246080]

約数ペア:

[(1, 21246080), (2, 10623040), (4, 5311520), (5, 4249216), (8, 2655760), (10, 2124608), (16, 1327880), (20, 1062304), (32, 663940), (40, 531152), (64, 331970), (80, 265576), (89, 238720), (128, 165985), (160, 132788), (178, 119360), (320, 66394), (356, 59680), (373, 56960), (445, 47744), (640, 33197), (712, 29840), (746, 28480), (890, 23872), (1424, 14920), (1492, 14240), (1780, 11936), (1865, 11392), (2848, 7460), (2984, 7120), (3560, 5968), (3730, 5696)]