21304912

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{691}}^1$

素因数の和:787

約数の個数: 40

約数和(自身を含む): 43247232

約数和(自身を除く): 21942320

約数列:

[1, 2, 4, 8, 16, 41, 47, 82, 94, 164, 188, 328, 376, 656, 691, 752, 1382, 1927, 2764, 3854, 5528, 7708, 11056, 15416, 28331, 30832, 32477, 56662, 64954, 113324, 129908, 226648, 259816, 453296, 519632, 1331557, 2663114, 5326228, 10652456, 21304912]

約数ペア:

[(1, 21304912), (2, 10652456), (4, 5326228), (8, 2663114), (16, 1331557), (41, 519632), (47, 453296), (82, 259816), (94, 226648), (164, 129908), (188, 113324), (328, 64954), (376, 56662), (656, 32477), (691, 30832), (752, 28331), (1382, 15416), (1927, 11056), (2764, 7708), (3854, 5528)]