20915180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:207

約数の個数: 96

約数和(自身を含む): 52835328

約数和(自身を除く): 31920148

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 71, 103, 110, 130, 142, 143, 206, 220, 260, 284, 286, 355, 412, 515, 572, 710, 715, 781, 923, 1030, 1133, 1339, 1420, 1430, 1562, 1846, 2060, 2266, 2678, 2860, 3124, 3692, 3905, 4532, 4615, 5356, 5665, 6695, 7313, 7810, 9230, 10153, 11330, 13390, 14626, 14729, 15620, 18460, 20306, 22660, 26780, 29252, 29458, 36565, 40612, 50765, 58916, 73130, 73645, 80443, 95069, 101530, 146260, 147290, 160886, 190138, 203060, 294580, 321772, 380276, 402215, 475345, 804430, 950690, 1045759, 1608860, 1901380, 2091518, 4183036, 5228795, 10457590, 20915180]

約数ペア:

[(1, 20915180), (2, 10457590), (4, 5228795), (5, 4183036), (10, 2091518), (11, 1901380), (13, 1608860), (20, 1045759), (22, 950690), (26, 804430), (44, 475345), (52, 402215), (55, 380276), (65, 321772), (71, 294580), (103, 203060), (110, 190138), (130, 160886), (142, 147290), (143, 146260), (206, 101530), (220, 95069), (260, 80443), (284, 73645), (286, 73130), (355, 58916), (412, 50765), (515, 40612), (572, 36565), (710, 29458), (715, 29252), (781, 26780), (923, 22660), (1030, 20306), (1133, 18460), (1339, 15620), (1420, 14729), (1430, 14626), (1562, 13390), (1846, 11330), (2060, 10153), (2266, 9230), (2678, 7810), (2860, 7313), (3124, 6695), (3692, 5665), (3905, 5356), (4532, 4615)]