128156420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{12893}}^1$

素因数の和:12980

約数の個数: 48

約数和(自身を含む): 311931648

約数和(自身を除く): 183775228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 12893, 25786, 51572, 64465, 90251, 128930, 180502, 257860, 361004, 451255, 902510, 915403, 1805020, 1830806, 3661612, 4577015, 6407821, 9154030, 12815642, 18308060, 25631284, 32039105, 64078210, 128156420]

約数ペア:

[(1, 128156420), (2, 64078210), (4, 32039105), (5, 25631284), (7, 18308060), (10, 12815642), (14, 9154030), (20, 6407821), (28, 4577015), (35, 3661612), (70, 1830806), (71, 1805020), (140, 915403), (142, 902510), (284, 451255), (355, 361004), (497, 257860), (710, 180502), (994, 128930), (1420, 90251), (1988, 64465), (2485, 51572), (4970, 25786), (9940, 12893)]