20820716

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 46212096

約数和(自身を除く): 25391380

約数列:

[1, 2, 4, 7, 14, 17, 28, 31, 34, 62, 68, 83, 119, 124, 166, 217, 238, 289, 332, 434, 476, 527, 578, 581, 868, 1054, 1156, 1162, 1411, 2023, 2108, 2324, 2573, 2822, 3689, 4046, 5146, 5644, 7378, 8092, 8959, 9877, 10292, 14756, 17918, 18011, 19754, 23987, 35836, 36022, 39508, 43741, 47974, 62713, 72044, 87482, 95948, 125426, 167909, 174964, 250852, 306187, 335818, 612374, 671636, 743597, 1224748, 1487194, 2974388, 5205179, 10410358, 20820716]

約数ペア:

[(1, 20820716), (2, 10410358), (4, 5205179), (7, 2974388), (14, 1487194), (17, 1224748), (28, 743597), (31, 671636), (34, 612374), (62, 335818), (68, 306187), (83, 250852), (119, 174964), (124, 167909), (166, 125426), (217, 95948), (238, 87482), (289, 72044), (332, 62713), (434, 47974), (476, 43741), (527, 39508), (578, 36022), (581, 35836), (868, 23987), (1054, 19754), (1156, 18011), (1162, 17918), (1411, 14756), (2023, 10292), (2108, 9877), (2324, 8959), (2573, 8092), (2822, 7378), (3689, 5644), (4046, 5146)]