21122608

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{587}}^1$

素因数の和:781

約数の個数: 40

約数和(自身を含む): 44403408

約数和(自身を除く): 23280800

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 173, 208, 346, 587, 692, 1174, 1384, 2249, 2348, 2768, 4498, 4696, 7631, 8996, 9392, 15262, 17992, 30524, 35984, 61048, 101551, 122096, 203102, 406204, 812408, 1320163, 1624816, 2640326, 5280652, 10561304, 21122608]

約数ペア:

[(1, 21122608), (2, 10561304), (4, 5280652), (8, 2640326), (13, 1624816), (16, 1320163), (26, 812408), (52, 406204), (104, 203102), (173, 122096), (208, 101551), (346, 61048), (587, 35984), (692, 30524), (1174, 17992), (1384, 15262), (2249, 9392), (2348, 8996), (2768, 7631), (4498, 4696)]