408865720

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1\times {\mathrm{487}}^1$

素因数の和:788

約数の個数: 64

約数和(自身を含む): 934617600

約数和(自身を除く): 525751880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 151, 278, 302, 487, 556, 604, 695, 755, 974, 1112, 1208, 1390, 1510, 1948, 2435, 2780, 3020, 3896, 4870, 5560, 6040, 9740, 19480, 20989, 41978, 67693, 73537, 83956, 104945, 135386, 147074, 167912, 209890, 270772, 294148, 338465, 367685, 419780, 541544, 588296, 676930, 735370, 839560, 1353860, 1470740, 2707720, 2941480, 10221643, 20443286, 40886572, 51108215, 81773144, 102216430, 204432860, 408865720]

約数ペア:

[(1, 408865720), (2, 204432860), (4, 102216430), (5, 81773144), (8, 51108215), (10, 40886572), (20, 20443286), (40, 10221643), (139, 2941480), (151, 2707720), (278, 1470740), (302, 1353860), (487, 839560), (556, 735370), (604, 676930), (695, 588296), (755, 541544), (974, 419780), (1112, 367685), (1208, 338465), (1390, 294148), (1510, 270772), (1948, 209890), (2435, 167912), (2780, 147074), (3020, 135386), (3896, 104945), (4870, 83956), (5560, 73537), (6040, 67693), (9740, 41978), (19480, 20989)]