64878940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{239}}^1\times {\mathrm{277}}^1$

素因数の和:539

約数の個数: 72

約数和(自身を含む): 159727680

約数和(自身を除く): 94848740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 239, 245, 277, 478, 490, 554, 956, 980, 1108, 1195, 1385, 1673, 1939, 2390, 2770, 3346, 3878, 4780, 5540, 6692, 7756, 8365, 9695, 11711, 13573, 16730, 19390, 23422, 27146, 33460, 38780, 46844, 54292, 58555, 66203, 67865, 117110, 132406, 135730, 234220, 264812, 271460, 331015, 463421, 662030, 926842, 1324060, 1853684, 2317105, 3243947, 4634210, 6487894, 9268420, 12975788, 16219735, 32439470, 64878940]

約数ペア:

[(1, 64878940), (2, 32439470), (4, 16219735), (5, 12975788), (7, 9268420), (10, 6487894), (14, 4634210), (20, 3243947), (28, 2317105), (35, 1853684), (49, 1324060), (70, 926842), (98, 662030), (140, 463421), (196, 331015), (239, 271460), (245, 264812), (277, 234220), (478, 135730), (490, 132406), (554, 117110), (956, 67865), (980, 66203), (1108, 58555), (1195, 54292), (1385, 46844), (1673, 38780), (1939, 33460), (2390, 27146), (2770, 23422), (3346, 19390), (3878, 16730), (4780, 13573), (5540, 11711), (6692, 9695), (7756, 8365)]