138440920

素因数分解:

$2^3\times 5^1\times {\mathrm{1361}}^1\times {\mathrm{2543}}^1$

素因数の和:3915

約数の個数: 32

約数和(自身を含む): 311843520

約数和(自身を除く): 173402600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1361, 2543, 2722, 5086, 5444, 6805, 10172, 10888, 12715, 13610, 20344, 25430, 27220, 50860, 54440, 101720, 3461023, 6922046, 13844092, 17305115, 27688184, 34610230, 69220460, 138440920]

約数ペア:

[(1, 138440920), (2, 69220460), (4, 34610230), (5, 27688184), (8, 17305115), (10, 13844092), (20, 6922046), (40, 3461023), (1361, 101720), (2543, 54440), (2722, 50860), (5086, 27220), (5444, 25430), (6805, 20344), (10172, 13610), (10888, 12715)]