21526540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{859}}^1$

素因数の和:1054

約数の個数: 48

約数和(自身を含む): 52012800

約数和(自身を除く): 30486260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 179, 358, 716, 859, 895, 1253, 1718, 1790, 2506, 3436, 3580, 4295, 5012, 6013, 6265, 8590, 12026, 12530, 17180, 24052, 25060, 30065, 60130, 120260, 153761, 307522, 615044, 768805, 1076327, 1537610, 2152654, 3075220, 4305308, 5381635, 10763270, 21526540]

約数ペア:

[(1, 21526540), (2, 10763270), (4, 5381635), (5, 4305308), (7, 3075220), (10, 2152654), (14, 1537610), (20, 1076327), (28, 768805), (35, 615044), (70, 307522), (140, 153761), (179, 120260), (358, 60130), (716, 30065), (859, 25060), (895, 24052), (1253, 17180), (1718, 12530), (1790, 12026), (2506, 8590), (3436, 6265), (3580, 6013), (4295, 5012)]