20080216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3643}}^1$

素因数の和:3715

約数の個数: 32

約数和(自身を含む): 41322960

約数和(自身を除く): 21242744

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 212, 424, 689, 1378, 2756, 3643, 5512, 7286, 14572, 29144, 47359, 94718, 189436, 193079, 378872, 386158, 772316, 1544632, 2510027, 5020054, 10040108, 20080216]

約数ペア:

[(1, 20080216), (2, 10040108), (4, 5020054), (8, 2510027), (13, 1544632), (26, 772316), (52, 386158), (53, 378872), (104, 193079), (106, 189436), (212, 94718), (424, 47359), (689, 29144), (1378, 14572), (2756, 7286), (3643, 5512)]