20287540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:257

約数の個数: 96

約数和(自身を含む): 53512704

約数和(自身を除く): 33225164

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 71, 91, 130, 140, 142, 157, 182, 260, 284, 314, 355, 364, 455, 497, 628, 710, 785, 910, 923, 994, 1099, 1420, 1570, 1820, 1846, 1988, 2041, 2198, 2485, 3140, 3692, 4082, 4396, 4615, 4970, 5495, 6461, 8164, 9230, 9940, 10205, 10990, 11147, 12922, 14287, 18460, 20410, 21980, 22294, 25844, 28574, 32305, 40820, 44588, 55735, 57148, 64610, 71435, 78029, 111470, 129220, 142870, 144911, 156058, 222940, 285740, 289822, 312116, 390145, 579644, 724555, 780290, 1014377, 1449110, 1560580, 2028754, 2898220, 4057508, 5071885, 10143770, 20287540]

約数ペア:

[(1, 20287540), (2, 10143770), (4, 5071885), (5, 4057508), (7, 2898220), (10, 2028754), (13, 1560580), (14, 1449110), (20, 1014377), (26, 780290), (28, 724555), (35, 579644), (52, 390145), (65, 312116), (70, 289822), (71, 285740), (91, 222940), (130, 156058), (140, 144911), (142, 142870), (157, 129220), (182, 111470), (260, 78029), (284, 71435), (314, 64610), (355, 57148), (364, 55735), (455, 44588), (497, 40820), (628, 32305), (710, 28574), (785, 25844), (910, 22294), (923, 21980), (994, 20410), (1099, 18460), (1420, 14287), (1570, 12922), (1820, 11147), (1846, 10990), (1988, 10205), (2041, 9940), (2198, 9230), (2485, 8164), (3140, 6461), (3692, 5495), (4082, 4970), (4396, 4615)]