20011940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4051}}^1$

素因数の和:4092

約数の個数: 48

約数和(自身を含む): 47651520

約数和(自身を除く): 27639580

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4051, 4940, 8102, 16204, 20255, 40510, 52663, 76969, 81020, 105326, 153938, 210652, 263315, 307876, 384845, 526630, 769690, 1000597, 1053260, 1539380, 2001194, 4002388, 5002985, 10005970, 20011940]

約数ペア:

[(1, 20011940), (2, 10005970), (4, 5002985), (5, 4002388), (10, 2001194), (13, 1539380), (19, 1053260), (20, 1000597), (26, 769690), (38, 526630), (52, 384845), (65, 307876), (76, 263315), (95, 210652), (130, 153938), (190, 105326), (247, 81020), (260, 76969), (380, 52663), (494, 40510), (988, 20255), (1235, 16204), (2470, 8102), (4051, 4940)]