21657568

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:407

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 23702432

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 152, 179, 199, 304, 358, 398, 608, 716, 796, 1432, 1592, 2864, 3184, 3401, 3781, 5728, 6368, 6802, 7562, 13604, 15124, 27208, 30248, 35621, 54416, 60496, 71242, 108832, 120992, 142484, 284968, 569936, 676799, 1139872, 1353598, 2707196, 5414392, 10828784, 21657568]

約数ペア:

[(1, 21657568), (2, 10828784), (4, 5414392), (8, 2707196), (16, 1353598), (19, 1139872), (32, 676799), (38, 569936), (76, 284968), (152, 142484), (179, 120992), (199, 108832), (304, 71242), (358, 60496), (398, 54416), (608, 35621), (716, 30248), (796, 27208), (1432, 15124), (1592, 13604), (2864, 7562), (3184, 6802), (3401, 6368), (3781, 5728)]