20961520

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4441}}^1$

素因数の和:4513

約数の個数: 40

約数和(自身を含む): 49572720

約数和(自身を除く): 28611200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4441, 4720, 8882, 17764, 22205, 35528, 44410, 71056, 88820, 177640, 262019, 355280, 524038, 1048076, 1310095, 2096152, 2620190, 4192304, 5240380, 10480760, 20961520]

約数ペア:

[(1, 20961520), (2, 10480760), (4, 5240380), (5, 4192304), (8, 2620190), (10, 2096152), (16, 1310095), (20, 1048076), (40, 524038), (59, 355280), (80, 262019), (118, 177640), (236, 88820), (295, 71056), (472, 44410), (590, 35528), (944, 22205), (1180, 17764), (2360, 8882), (4441, 4720)]