21625180

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 46823616

約数和(自身を除く): 25198436

約数列:

[1, 2, 4, 5, 10, 20, 71, 97, 142, 157, 194, 284, 314, 355, 388, 485, 628, 710, 785, 970, 1420, 1570, 1940, 3140, 6887, 11147, 13774, 15229, 22294, 27548, 30458, 34435, 44588, 55735, 60916, 68870, 76145, 111470, 137740, 152290, 222940, 304580, 1081259, 2162518, 4325036, 5406295, 10812590, 21625180]

約数ペア:

[(1, 21625180), (2, 10812590), (4, 5406295), (5, 4325036), (10, 2162518), (20, 1081259), (71, 304580), (97, 222940), (142, 152290), (157, 137740), (194, 111470), (284, 76145), (314, 68870), (355, 60916), (388, 55735), (485, 44588), (628, 34435), (710, 30458), (785, 27548), (970, 22294), (1420, 15229), (1570, 13774), (1940, 11147), (3140, 6887)]