21450080

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1697}}^1$

素因数の和:1791

約数の個数: 48

約数和(自身を含む): 51347520

約数和(自身を除く): 29897440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 1697, 2528, 3160, 3394, 6320, 6788, 8485, 12640, 13576, 16970, 27152, 33940, 54304, 67880, 134063, 135760, 268126, 271520, 536252, 670315, 1072504, 1340630, 2145008, 2681260, 4290016, 5362520, 10725040, 21450080]

約数ペア:

[(1, 21450080), (2, 10725040), (4, 5362520), (5, 4290016), (8, 2681260), (10, 2145008), (16, 1340630), (20, 1072504), (32, 670315), (40, 536252), (79, 271520), (80, 268126), (158, 135760), (160, 134063), (316, 67880), (395, 54304), (632, 33940), (790, 27152), (1264, 16970), (1580, 13576), (1697, 12640), (2528, 8485), (3160, 6788), (3394, 6320)]