28223680

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{991}}^1$

素因数の和:1097

約数の個数: 56

約数和(自身を含む): 68031360

約数和(自身を除く): 39807680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 712, 890, 991, 1424, 1780, 1982, 2848, 3560, 3964, 4955, 5696, 7120, 7928, 9910, 14240, 15856, 19820, 28480, 31712, 39640, 63424, 79280, 88199, 158560, 176398, 317120, 352796, 440995, 705592, 881990, 1411184, 1763980, 2822368, 3527960, 5644736, 7055920, 14111840, 28223680]

約数ペア:

[(1, 28223680), (2, 14111840), (4, 7055920), (5, 5644736), (8, 3527960), (10, 2822368), (16, 1763980), (20, 1411184), (32, 881990), (40, 705592), (64, 440995), (80, 352796), (89, 317120), (160, 176398), (178, 158560), (320, 88199), (356, 79280), (445, 63424), (712, 39640), (890, 31712), (991, 28480), (1424, 19820), (1780, 15856), (1982, 14240), (2848, 9910), (3560, 7928), (3964, 7120), (4955, 5696)]