21058640

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^2\times {\mathrm{313}}^1$

素因数の和:384

約数の個数: 60

約数和(自身を含む): 50869884

約数和(自身を除く): 29811244

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 313, 464, 580, 626, 841, 1160, 1252, 1565, 1682, 2320, 2504, 3130, 3364, 4205, 5008, 6260, 6728, 8410, 9077, 12520, 13456, 16820, 18154, 25040, 33640, 36308, 45385, 67280, 72616, 90770, 145232, 181540, 263233, 363080, 526466, 726160, 1052932, 1316165, 2105864, 2632330, 4211728, 5264660, 10529320, 21058640]

約数ペア:

[(1, 21058640), (2, 10529320), (4, 5264660), (5, 4211728), (8, 2632330), (10, 2105864), (16, 1316165), (20, 1052932), (29, 726160), (40, 526466), (58, 363080), (80, 263233), (116, 181540), (145, 145232), (232, 90770), (290, 72616), (313, 67280), (464, 45385), (580, 36308), (626, 33640), (841, 25040), (1160, 18154), (1252, 16820), (1565, 13456), (1682, 12520), (2320, 9077), (2504, 8410), (3130, 6728), (3364, 6260), (4205, 5008)]