21209776

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{9967}}^1$

素因数の和:10001

約数の個数: 40

約数和(自身を含む): 49441280

約数和(自身を除く): 28231504

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 9967, 19934, 39868, 69769, 79736, 139538, 159472, 189373, 279076, 378746, 558152, 757492, 1116304, 1325611, 1514984, 2651222, 3029968, 5302444, 10604888, 21209776]

約数ペア:

[(1, 21209776), (2, 10604888), (4, 5302444), (7, 3029968), (8, 2651222), (14, 1514984), (16, 1325611), (19, 1116304), (28, 757492), (38, 558152), (56, 378746), (76, 279076), (112, 189373), (133, 159472), (152, 139538), (266, 79736), (304, 69769), (532, 39868), (1064, 19934), (2128, 9967)]