21638608

素因数分解:

$2^4\times {\mathrm{509}}^1\times {\mathrm{2657}}^1$

素因数の和:3174

約数の個数: 20

約数和(自身を含む): 42022980

約数和(自身を除く): 20384372

約数列:

[1, 2, 4, 8, 16, 509, 1018, 2036, 2657, 4072, 5314, 8144, 10628, 21256, 42512, 1352413, 2704826, 5409652, 10819304, 21638608]

約数ペア:

[(1, 21638608), (2, 10819304), (4, 5409652), (8, 2704826), (16, 1352413), (509, 42512), (1018, 21256), (2036, 10628), (2657, 8144), (4072, 5314)]