21903128

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{4481}}^1$

素因数の和:4547

約数の個数: 32

約数和(自身を含む): 45178560

約数和(自身を除く): 23275432

約数列:

[1, 2, 4, 8, 13, 26, 47, 52, 94, 104, 188, 376, 611, 1222, 2444, 4481, 4888, 8962, 17924, 35848, 58253, 116506, 210607, 233012, 421214, 466024, 842428, 1684856, 2737891, 5475782, 10951564, 21903128]

約数ペア:

[(1, 21903128), (2, 10951564), (4, 5475782), (8, 2737891), (13, 1684856), (26, 842428), (47, 466024), (52, 421214), (94, 233012), (104, 210607), (188, 116506), (376, 58253), (611, 35848), (1222, 17924), (2444, 8962), (4481, 4888)]