16421720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{263}}^1$

素因数の和:504

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 26156200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 223, 263, 280, 446, 526, 892, 1052, 1115, 1315, 1561, 1784, 1841, 2104, 2230, 2630, 3122, 3682, 4460, 5260, 6244, 7364, 7805, 8920, 9205, 10520, 12488, 14728, 15610, 18410, 31220, 36820, 58649, 62440, 73640, 117298, 234596, 293245, 410543, 469192, 586490, 821086, 1172980, 1642172, 2052715, 2345960, 3284344, 4105430, 8210860, 16421720]

約数ペア:

[(1, 16421720), (2, 8210860), (4, 4105430), (5, 3284344), (7, 2345960), (8, 2052715), (10, 1642172), (14, 1172980), (20, 821086), (28, 586490), (35, 469192), (40, 410543), (56, 293245), (70, 234596), (140, 117298), (223, 73640), (263, 62440), (280, 58649), (446, 36820), (526, 31220), (892, 18410), (1052, 15610), (1115, 14728), (1315, 12488), (1561, 10520), (1784, 9205), (1841, 8920), (2104, 7805), (2230, 7364), (2630, 6244), (3122, 5260), (3682, 4460)]