128778860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{331}}^1\times {\mathrm{397}}^1$

素因数の和:751

約数の個数: 72

約数和(自身を含む): 316333584

約数和(自身を除く): 187554724

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 331, 397, 490, 662, 794, 980, 1324, 1588, 1655, 1985, 2317, 2779, 3310, 3970, 4634, 5558, 6620, 7940, 9268, 11116, 11585, 13895, 16219, 19453, 23170, 27790, 32438, 38906, 46340, 55580, 64876, 77812, 81095, 97265, 131407, 162190, 194530, 262814, 324380, 389060, 525628, 657035, 919849, 1314070, 1839698, 2628140, 3679396, 4599245, 6438943, 9198490, 12877886, 18396980, 25755772, 32194715, 64389430, 128778860]

約数ペア:

[(1, 128778860), (2, 64389430), (4, 32194715), (5, 25755772), (7, 18396980), (10, 12877886), (14, 9198490), (20, 6438943), (28, 4599245), (35, 3679396), (49, 2628140), (70, 1839698), (98, 1314070), (140, 919849), (196, 657035), (245, 525628), (331, 389060), (397, 324380), (490, 262814), (662, 194530), (794, 162190), (980, 131407), (1324, 97265), (1588, 81095), (1655, 77812), (1985, 64876), (2317, 55580), (2779, 46340), (3310, 38906), (3970, 32438), (4634, 27790), (5558, 23170), (6620, 19453), (7940, 16219), (9268, 13895), (11116, 11585)]