21379408

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70327}}^1$

素因数の和:70354

約数の個数: 20

約数和(自身を含む): 43603360

約数和(自身を除く): 22223952

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70327, 140654, 281308, 562616, 1125232, 1336213, 2672426, 5344852, 10689704, 21379408]

約数ペア:

[(1, 21379408), (2, 10689704), (4, 5344852), (8, 2672426), (16, 1336213), (19, 1125232), (38, 562616), (76, 281308), (152, 140654), (304, 70327)]