21106928

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{1063}}^1$

素因数の和:1161

約数の個数: 40

約数和(自身を含む): 43934688

約数和(自身を除く): 22827760

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 73, 136, 146, 272, 292, 584, 1063, 1168, 1241, 2126, 2482, 4252, 4964, 8504, 9928, 17008, 18071, 19856, 36142, 72284, 77599, 144568, 155198, 289136, 310396, 620792, 1241584, 1319183, 2638366, 5276732, 10553464, 21106928]

約数ペア:

[(1, 21106928), (2, 10553464), (4, 5276732), (8, 2638366), (16, 1319183), (17, 1241584), (34, 620792), (68, 310396), (73, 289136), (136, 155198), (146, 144568), (272, 77599), (292, 72284), (584, 36142), (1063, 19856), (1168, 18071), (1241, 17008), (2126, 9928), (2482, 8504), (4252, 4964)]