20159536

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:517

約数の個数: 40

約数和(自身を含む): 40622400

約数和(自身を除く): 20462864

約数列:

[1, 2, 4, 8, 16, 41, 79, 82, 158, 164, 316, 328, 389, 632, 656, 778, 1264, 1556, 3112, 3239, 6224, 6478, 12956, 15949, 25912, 30731, 31898, 51824, 61462, 63796, 122924, 127592, 245848, 255184, 491696, 1259971, 2519942, 5039884, 10079768, 20159536]

約数ペア:

[(1, 20159536), (2, 10079768), (4, 5039884), (8, 2519942), (16, 1259971), (41, 491696), (79, 255184), (82, 245848), (158, 127592), (164, 122924), (316, 63796), (328, 61462), (389, 51824), (632, 31898), (656, 30731), (778, 25912), (1264, 15949), (1556, 12956), (3112, 6478), (3239, 6224)]