19940350

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:261

約数の個数: 48

約数和(自身を含む): 38810016

約数和(自身を除く): 18869666

約数列:

[1, 2, 5, 10, 25, 41, 50, 71, 82, 137, 142, 205, 274, 355, 410, 685, 710, 1025, 1370, 1775, 2050, 2911, 3425, 3550, 5617, 5822, 6850, 9727, 11234, 14555, 19454, 28085, 29110, 48635, 56170, 72775, 97270, 140425, 145550, 243175, 280850, 398807, 486350, 797614, 1994035, 3988070, 9970175, 19940350]

約数ペア:

[(1, 19940350), (2, 9970175), (5, 3988070), (10, 1994035), (25, 797614), (41, 486350), (50, 398807), (71, 280850), (82, 243175), (137, 145550), (142, 140425), (205, 97270), (274, 72775), (355, 56170), (410, 48635), (685, 29110), (710, 28085), (1025, 19454), (1370, 14555), (1775, 11234), (2050, 9727), (2911, 6850), (3425, 5822), (3550, 5617)]