28528780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{677}}^1$

素因数の和:743

約数の個数: 72

約数和(自身を含む): 71417808

約数和(自身を除く): 42889028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 490, 602, 677, 860, 980, 1204, 1354, 1505, 2107, 2708, 3010, 3385, 4214, 4739, 6020, 6770, 8428, 9478, 10535, 13540, 18956, 21070, 23695, 29111, 33173, 42140, 47390, 58222, 66346, 94780, 116444, 132692, 145555, 165865, 203777, 291110, 331730, 407554, 582220, 663460, 815108, 1018885, 1426439, 2037770, 2852878, 4075540, 5705756, 7132195, 14264390, 28528780]

約数ペア:

[(1, 28528780), (2, 14264390), (4, 7132195), (5, 5705756), (7, 4075540), (10, 2852878), (14, 2037770), (20, 1426439), (28, 1018885), (35, 815108), (43, 663460), (49, 582220), (70, 407554), (86, 331730), (98, 291110), (140, 203777), (172, 165865), (196, 145555), (215, 132692), (245, 116444), (301, 94780), (430, 66346), (490, 58222), (602, 47390), (677, 42140), (860, 33173), (980, 29111), (1204, 23695), (1354, 21070), (1505, 18956), (2107, 13540), (2708, 10535), (3010, 9478), (3385, 8428), (4214, 6770), (4739, 6020)]