20795900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 47809440

約数和(自身を除く): 27013540

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 71, 100, 101, 116, 142, 145, 202, 284, 290, 355, 404, 505, 580, 710, 725, 1010, 1420, 1450, 1775, 2020, 2059, 2525, 2900, 2929, 3550, 4118, 5050, 5858, 7100, 7171, 8236, 10100, 10295, 11716, 14342, 14645, 20590, 28684, 29290, 35855, 41180, 51475, 58580, 71710, 73225, 102950, 143420, 146450, 179275, 205900, 207959, 292900, 358550, 415918, 717100, 831836, 1039795, 2079590, 4159180, 5198975, 10397950, 20795900]

約数ペア:

[(1, 20795900), (2, 10397950), (4, 5198975), (5, 4159180), (10, 2079590), (20, 1039795), (25, 831836), (29, 717100), (50, 415918), (58, 358550), (71, 292900), (100, 207959), (101, 205900), (116, 179275), (142, 146450), (145, 143420), (202, 102950), (284, 73225), (290, 71710), (355, 58580), (404, 51475), (505, 41180), (580, 35855), (710, 29290), (725, 28684), (1010, 20590), (1420, 14645), (1450, 14342), (1775, 11716), (2020, 10295), (2059, 10100), (2525, 8236), (2900, 7171), (2929, 7100), (3550, 5858), (4118, 5050)]