19765120

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{347}}^1$

素因数の和:455

約数の個数: 64

約数和(自身を含む): 47919600

約数和(自身を除く): 28154480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 347, 356, 445, 640, 694, 712, 890, 1388, 1424, 1735, 1780, 2776, 2848, 3470, 3560, 5552, 5696, 6940, 7120, 11104, 11392, 13880, 14240, 22208, 27760, 28480, 30883, 44416, 55520, 56960, 61766, 111040, 123532, 154415, 222080, 247064, 308830, 494128, 617660, 988256, 1235320, 1976512, 2470640, 3953024, 4941280, 9882560, 19765120]

約数ペア:

[(1, 19765120), (2, 9882560), (4, 4941280), (5, 3953024), (8, 2470640), (10, 1976512), (16, 1235320), (20, 988256), (32, 617660), (40, 494128), (64, 308830), (80, 247064), (89, 222080), (128, 154415), (160, 123532), (178, 111040), (320, 61766), (347, 56960), (356, 55520), (445, 44416), (640, 30883), (694, 28480), (712, 27760), (890, 22208), (1388, 14240), (1424, 13880), (1735, 11392), (1780, 11104), (2776, 7120), (2848, 6940), (3470, 5696), (3560, 5552)]