20870018

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{509}}^1$

素因数の和:626

約数の個数: 32

約数和(自身を含む): 35985600

約数和(自身を除く): 15115582

約数列:

[1, 2, 13, 19, 26, 38, 83, 166, 247, 494, 509, 1018, 1079, 1577, 2158, 3154, 6617, 9671, 13234, 19342, 20501, 41002, 42247, 84494, 125723, 251446, 549211, 802693, 1098422, 1605386, 10435009, 20870018]

約数ペア:

[(1, 20870018), (2, 10435009), (13, 1605386), (19, 1098422), (26, 802693), (38, 549211), (83, 251446), (166, 125723), (247, 84494), (494, 42247), (509, 41002), (1018, 20501), (1079, 19342), (1577, 13234), (2158, 9671), (3154, 6617)]