20391540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2011}}^1$

素因数の和:2049

約数の個数: 72

約数和(自身を含む): 61856928

約数和(自身を除く): 41465388

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 169, 195, 260, 338, 390, 507, 676, 780, 845, 1014, 1690, 2011, 2028, 2535, 3380, 4022, 5070, 6033, 8044, 10055, 10140, 12066, 20110, 24132, 26143, 30165, 40220, 52286, 60330, 78429, 104572, 120660, 130715, 156858, 261430, 313716, 339859, 392145, 522860, 679718, 784290, 1019577, 1359436, 1568580, 1699295, 2039154, 3398590, 4078308, 5097885, 6797180, 10195770, 20391540]

約数ペア:

[(1, 20391540), (2, 10195770), (3, 6797180), (4, 5097885), (5, 4078308), (6, 3398590), (10, 2039154), (12, 1699295), (13, 1568580), (15, 1359436), (20, 1019577), (26, 784290), (30, 679718), (39, 522860), (52, 392145), (60, 339859), (65, 313716), (78, 261430), (130, 156858), (156, 130715), (169, 120660), (195, 104572), (260, 78429), (338, 60330), (390, 52286), (507, 40220), (676, 30165), (780, 26143), (845, 24132), (1014, 20110), (1690, 12066), (2011, 10140), (2028, 10055), (2535, 8044), (3380, 6033), (4022, 5070)]