21387896

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{331}}^1$

素因数の和:575

約数の個数: 32

約数和(自身を含む): 41413680

約数和(自身を除く): 20025784

約数列:

[1, 2, 4, 8, 41, 82, 164, 197, 328, 331, 394, 662, 788, 1324, 1576, 2648, 8077, 13571, 16154, 27142, 32308, 54284, 64616, 65207, 108568, 130414, 260828, 521656, 2673487, 5346974, 10693948, 21387896]

約数ペア:

[(1, 21387896), (2, 10693948), (4, 5346974), (8, 2673487), (41, 521656), (82, 260828), (164, 130414), (197, 108568), (328, 65207), (331, 64616), (394, 54284), (662, 32308), (788, 27142), (1324, 16154), (1576, 13571), (2648, 8077)]