21115663760

素因数分解:

$2^4\times 5^1\times {\mathrm{6791}}^1\times {\mathrm{38867}}^1$

素因数の和:45671

約数の個数: 40

約数和(自身を含む): 49102410816

約数和(自身を除く): 27986747056

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 6791, 13582, 27164, 33955, 38867, 54328, 67910, 77734, 108656, 135820, 155468, 194335, 271640, 310936, 388670, 543280, 621872, 777340, 1554680, 3109360, 263945797, 527891594, 1055783188, 1319728985, 2111566376, 2639457970, 4223132752, 5278915940, 10557831880, 21115663760]

約数ペア:

[(1, 21115663760), (2, 10557831880), (4, 5278915940), (5, 4223132752), (8, 2639457970), (10, 2111566376), (16, 1319728985), (20, 1055783188), (40, 527891594), (80, 263945797), (6791, 3109360), (13582, 1554680), (27164, 777340), (33955, 621872), (38867, 543280), (54328, 388670), (67910, 310936), (77734, 271640), (108656, 194335), (135820, 155468)]