68885620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{349}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 148176000

約数和(自身を除く): 79290380

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 278, 284, 349, 355, 556, 695, 698, 710, 1390, 1396, 1420, 1745, 2780, 3490, 6980, 9869, 19738, 24779, 39476, 48511, 49345, 49558, 97022, 98690, 99116, 123895, 194044, 197380, 242555, 247790, 485110, 495580, 970220, 3444281, 6888562, 13777124, 17221405, 34442810, 68885620]

約数ペア:

[(1, 68885620), (2, 34442810), (4, 17221405), (5, 13777124), (10, 6888562), (20, 3444281), (71, 970220), (139, 495580), (142, 485110), (278, 247790), (284, 242555), (349, 197380), (355, 194044), (556, 123895), (695, 99116), (698, 98690), (710, 97022), (1390, 49558), (1396, 49345), (1420, 48511), (1745, 39476), (2780, 24779), (3490, 19738), (6980, 9869)]