19997728

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1061}}^1$

素因数の和:1121

約数の個数: 48

約数和(自身を含む): 42819840

約数和(自身を除く): 22822112

約数列:

[1, 2, 4, 8, 16, 19, 31, 32, 38, 62, 76, 124, 152, 248, 304, 496, 589, 608, 992, 1061, 1178, 2122, 2356, 4244, 4712, 8488, 9424, 16976, 18848, 20159, 32891, 33952, 40318, 65782, 80636, 131564, 161272, 263128, 322544, 526256, 624929, 645088, 1052512, 1249858, 2499716, 4999432, 9998864, 19997728]

約数ペア:

[(1, 19997728), (2, 9998864), (4, 4999432), (8, 2499716), (16, 1249858), (19, 1052512), (31, 645088), (32, 624929), (38, 526256), (62, 322544), (76, 263128), (124, 161272), (152, 131564), (248, 80636), (304, 65782), (496, 40318), (589, 33952), (608, 32891), (992, 20159), (1061, 18848), (1178, 16976), (2122, 9424), (2356, 8488), (4244, 4712)]