21635720

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4259}}^1$

素因数の和:4397

約数の個数: 32

約数和(自身を含む): 49075200

約数和(自身を除く): 27439480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4259, 5080, 8518, 17036, 21295, 34072, 42590, 85180, 170360, 540893, 1081786, 2163572, 2704465, 4327144, 5408930, 10817860, 21635720]

約数ペア:

[(1, 21635720), (2, 10817860), (4, 5408930), (5, 4327144), (8, 2704465), (10, 2163572), (20, 1081786), (40, 540893), (127, 170360), (254, 85180), (508, 42590), (635, 34072), (1016, 21295), (1270, 17036), (2540, 8518), (4259, 5080)]