28478900

素因数分解:

$2^2\times 5^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:273

約数の個数: 72

約数和(自身を含む): 65308320

約数和(自身を除く): 36829420

約数列:

[1, 2, 4, 5, 10, 20, 25, 37, 43, 50, 74, 86, 100, 148, 172, 179, 185, 215, 358, 370, 430, 716, 740, 860, 895, 925, 1075, 1591, 1790, 1850, 2150, 3182, 3580, 3700, 4300, 4475, 6364, 6623, 7697, 7955, 8950, 13246, 15394, 15910, 17900, 26492, 30788, 31820, 33115, 38485, 39775, 66230, 76970, 79550, 132460, 153940, 159100, 165575, 192425, 284789, 331150, 384850, 569578, 662300, 769700, 1139156, 1423945, 2847890, 5695780, 7119725, 14239450, 28478900]

約数ペア:

[(1, 28478900), (2, 14239450), (4, 7119725), (5, 5695780), (10, 2847890), (20, 1423945), (25, 1139156), (37, 769700), (43, 662300), (50, 569578), (74, 384850), (86, 331150), (100, 284789), (148, 192425), (172, 165575), (179, 159100), (185, 153940), (215, 132460), (358, 79550), (370, 76970), (430, 66230), (716, 39775), (740, 38485), (860, 33115), (895, 31820), (925, 30788), (1075, 26492), (1591, 17900), (1790, 15910), (1850, 15394), (2150, 13246), (3182, 8950), (3580, 7955), (3700, 7697), (4300, 6623), (4475, 6364)]