20890940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^2\times {\mathrm{109}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 52002720

約数和(自身を除く): 31111780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 109, 140, 148, 185, 218, 259, 370, 436, 518, 545, 740, 763, 1036, 1090, 1295, 1369, 1526, 2180, 2590, 2738, 3052, 3815, 4033, 5180, 5476, 6845, 7630, 8066, 9583, 13690, 15260, 16132, 19166, 20165, 27380, 28231, 38332, 40330, 47915, 56462, 80660, 95830, 112924, 141155, 149221, 191660, 282310, 298442, 564620, 596884, 746105, 1044547, 1492210, 2089094, 2984420, 4178188, 5222735, 10445470, 20890940]

約数ペア:

[(1, 20890940), (2, 10445470), (4, 5222735), (5, 4178188), (7, 2984420), (10, 2089094), (14, 1492210), (20, 1044547), (28, 746105), (35, 596884), (37, 564620), (70, 298442), (74, 282310), (109, 191660), (140, 149221), (148, 141155), (185, 112924), (218, 95830), (259, 80660), (370, 56462), (436, 47915), (518, 40330), (545, 38332), (740, 28231), (763, 27380), (1036, 20165), (1090, 19166), (1295, 16132), (1369, 15260), (1526, 13690), (2180, 9583), (2590, 8066), (2738, 7630), (3052, 6845), (3815, 5476), (4033, 5180)]