21260320

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1493}}^1$

素因数の和:1597

約数の個数: 48

約数和(自身を含む): 50825880

約数和(自身を除く): 29565560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1493, 1780, 2848, 2986, 3560, 5972, 7120, 7465, 11944, 14240, 14930, 23888, 29860, 47776, 59720, 119440, 132877, 238880, 265754, 531508, 664385, 1063016, 1328770, 2126032, 2657540, 4252064, 5315080, 10630160, 21260320]

約数ペア:

[(1, 21260320), (2, 10630160), (4, 5315080), (5, 4252064), (8, 2657540), (10, 2126032), (16, 1328770), (20, 1063016), (32, 664385), (40, 531508), (80, 265754), (89, 238880), (160, 132877), (178, 119440), (356, 59720), (445, 47776), (712, 29860), (890, 23888), (1424, 14930), (1493, 14240), (1780, 11944), (2848, 7465), (2986, 7120), (3560, 5972)]