21681850

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{787}}^1$

素因数の和:847

約数の個数: 48

約数和(自身を含む): 43970400

約数和(自身を除く): 22288550

約数列:

[1, 2, 5, 10, 19, 25, 29, 38, 50, 58, 95, 145, 190, 290, 475, 551, 725, 787, 950, 1102, 1450, 1574, 2755, 3935, 5510, 7870, 13775, 14953, 19675, 22823, 27550, 29906, 39350, 45646, 74765, 114115, 149530, 228230, 373825, 433637, 570575, 747650, 867274, 1141150, 2168185, 4336370, 10840925, 21681850]

約数ペア:

[(1, 21681850), (2, 10840925), (5, 4336370), (10, 2168185), (19, 1141150), (25, 867274), (29, 747650), (38, 570575), (50, 433637), (58, 373825), (95, 228230), (145, 149530), (190, 114115), (290, 74765), (475, 45646), (551, 39350), (725, 29906), (787, 27550), (950, 22823), (1102, 19675), (1450, 14953), (1574, 13775), (2755, 7870), (3935, 5510)]