21568784

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{443}}^1$

素因数の和:647

約数の個数: 40

約数和(自身を含む): 44595360

約数和(自身を除く): 23026576

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 179, 272, 358, 443, 716, 886, 1432, 1772, 2864, 3043, 3544, 6086, 7088, 7531, 12172, 15062, 24344, 30124, 48688, 60248, 79297, 120496, 158594, 317188, 634376, 1268752, 1348049, 2696098, 5392196, 10784392, 21568784]

約数ペア:

[(1, 21568784), (2, 10784392), (4, 5392196), (8, 2696098), (16, 1348049), (17, 1268752), (34, 634376), (68, 317188), (136, 158594), (179, 120496), (272, 79297), (358, 60248), (443, 48688), (716, 30124), (886, 24344), (1432, 15062), (1772, 12172), (2864, 7531), (3043, 7088), (3544, 6086)]