21238210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{2389}}^1$

素因数の和:2530

約数の個数: 32

約数和(自身を含む): 44052480

約数和(自身を除く): 22814270

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 127, 254, 635, 889, 1270, 1778, 2389, 4445, 4778, 8890, 11945, 16723, 23890, 33446, 83615, 167230, 303403, 606806, 1517015, 2123821, 3034030, 4247642, 10619105, 21238210]

約数ペア:

[(1, 21238210), (2, 10619105), (5, 4247642), (7, 3034030), (10, 2123821), (14, 1517015), (35, 606806), (70, 303403), (127, 167230), (254, 83615), (635, 33446), (889, 23890), (1270, 16723), (1778, 11945), (2389, 8890), (4445, 4778)]