21081904

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{433}}^1$

素因数の和:637

約数の個数: 40

約数和(自身を含む): 43590960

約数和(自身を除く): 22509056

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 179, 272, 358, 433, 716, 866, 1432, 1732, 2864, 3043, 3464, 6086, 6928, 7361, 12172, 14722, 24344, 29444, 48688, 58888, 77507, 117776, 155014, 310028, 620056, 1240112, 1317619, 2635238, 5270476, 10540952, 21081904]

約数ペア:

[(1, 21081904), (2, 10540952), (4, 5270476), (8, 2635238), (16, 1317619), (17, 1240112), (34, 620056), (68, 310028), (136, 155014), (179, 117776), (272, 77507), (358, 58888), (433, 48688), (716, 29444), (866, 24344), (1432, 14722), (1732, 12172), (2864, 7361), (3043, 6928), (3464, 6086)]