491119780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1\times {\mathrm{991}}^1$

素因数の和:1420

約数の個数: 48

約数和(自身を含む): 1049932800

約数和(自身を除く): 558813020

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 349, 355, 698, 710, 991, 1396, 1420, 1745, 1982, 3490, 3964, 4955, 6980, 9910, 19820, 24779, 49558, 70361, 99116, 123895, 140722, 247790, 281444, 345859, 351805, 495580, 691718, 703610, 1383436, 1407220, 1729295, 3458590, 6917180, 24555989, 49111978, 98223956, 122779945, 245559890, 491119780]

約数ペア:

[(1, 491119780), (2, 245559890), (4, 122779945), (5, 98223956), (10, 49111978), (20, 24555989), (71, 6917180), (142, 3458590), (284, 1729295), (349, 1407220), (355, 1383436), (698, 703610), (710, 691718), (991, 495580), (1396, 351805), (1420, 345859), (1745, 281444), (1982, 247790), (3490, 140722), (3964, 123895), (4955, 99116), (6980, 70361), (9910, 49558), (19820, 24779)]