21420560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1319}}^1$

素因数の和:1368

約数の個数: 80

約数和(自身を含む): 58924800

約数和(自身を除く): 37504240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 203, 232, 280, 290, 406, 464, 560, 580, 812, 1015, 1160, 1319, 1624, 2030, 2320, 2638, 3248, 4060, 5276, 6595, 8120, 9233, 10552, 13190, 16240, 18466, 21104, 26380, 36932, 38251, 46165, 52760, 73864, 76502, 92330, 105520, 147728, 153004, 184660, 191255, 267757, 306008, 369320, 382510, 535514, 612016, 738640, 765020, 1071028, 1338785, 1530040, 2142056, 2677570, 3060080, 4284112, 5355140, 10710280, 21420560]

約数ペア:

[(1, 21420560), (2, 10710280), (4, 5355140), (5, 4284112), (7, 3060080), (8, 2677570), (10, 2142056), (14, 1530040), (16, 1338785), (20, 1071028), (28, 765020), (29, 738640), (35, 612016), (40, 535514), (56, 382510), (58, 369320), (70, 306008), (80, 267757), (112, 191255), (116, 184660), (140, 153004), (145, 147728), (203, 105520), (232, 92330), (280, 76502), (290, 73864), (406, 52760), (464, 46165), (560, 38251), (580, 36932), (812, 26380), (1015, 21104), (1160, 18466), (1319, 16240), (1624, 13190), (2030, 10552), (2320, 9233), (2638, 8120), (3248, 6595), (4060, 5276)]