21112385

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 32282064

約数和(自身を除く): 11169679

約数列:

[1, 5, 7, 17, 35, 37, 49, 85, 119, 137, 185, 245, 259, 595, 629, 685, 833, 959, 1295, 1813, 2329, 3145, 4165, 4403, 4795, 5069, 6713, 9065, 11645, 16303, 22015, 25345, 30821, 33565, 35483, 81515, 86173, 114121, 154105, 177415, 248381, 430865, 570605, 603211, 1241905, 3016055, 4222477, 21112385]

約数ペア:

[(1, 21112385), (5, 4222477), (7, 3016055), (17, 1241905), (35, 603211), (37, 570605), (49, 430865), (85, 248381), (119, 177415), (137, 154105), (185, 114121), (245, 86173), (259, 81515), (595, 35483), (629, 33565), (685, 30821), (833, 25345), (959, 22015), (1295, 16303), (1813, 11645), (2329, 9065), (3145, 6713), (4165, 5069), (4403, 4795)]