21142744

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:704

約数の個数: 64

約数和(自身を含む): 49305600

約数和(自身を除く): 28162856

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 31, 38, 56, 62, 76, 124, 133, 152, 217, 248, 266, 434, 532, 589, 641, 868, 1064, 1178, 1282, 1736, 2356, 2564, 4123, 4487, 4712, 5128, 8246, 8974, 12179, 16492, 17948, 19871, 24358, 32984, 35896, 39742, 48716, 79484, 85253, 97432, 139097, 158968, 170506, 278194, 341012, 377549, 556388, 682024, 755098, 1112776, 1510196, 2642843, 3020392, 5285686, 10571372, 21142744]

約数ペア:

[(1, 21142744), (2, 10571372), (4, 5285686), (7, 3020392), (8, 2642843), (14, 1510196), (19, 1112776), (28, 755098), (31, 682024), (38, 556388), (56, 377549), (62, 341012), (76, 278194), (124, 170506), (133, 158968), (152, 139097), (217, 97432), (248, 85253), (266, 79484), (434, 48716), (532, 39742), (589, 35896), (641, 32984), (868, 24358), (1064, 19871), (1178, 17948), (1282, 16492), (1736, 12179), (2356, 8974), (2564, 8246), (4123, 5128), (4487, 4712)]