399967520

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{31643}}^1$

素因数の和:31737

約数の個数: 48

約数和(自身を含む): 956914560

約数和(自身を除く): 556947040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 2528, 3160, 6320, 12640, 31643, 63286, 126572, 158215, 253144, 316430, 506288, 632860, 1012576, 1265720, 2499797, 2531440, 4999594, 5062880, 9999188, 12498985, 19998376, 24997970, 39996752, 49995940, 79993504, 99991880, 199983760, 399967520]

約数ペア:

[(1, 399967520), (2, 199983760), (4, 99991880), (5, 79993504), (8, 49995940), (10, 39996752), (16, 24997970), (20, 19998376), (32, 12498985), (40, 9999188), (79, 5062880), (80, 4999594), (158, 2531440), (160, 2499797), (316, 1265720), (395, 1012576), (632, 632860), (790, 506288), (1264, 316430), (1580, 253144), (2528, 158215), (3160, 126572), (6320, 63286), (12640, 31643)]