21086478

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1481}}^1$

素因数の和:1609

約数の個数: 48

約数和(自身を含む): 52711776

約数和(自身を除く): 31625298

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 113, 126, 226, 339, 678, 791, 1017, 1481, 1582, 2034, 2373, 2962, 4443, 4746, 7119, 8886, 10367, 13329, 14238, 20734, 26658, 31101, 62202, 93303, 167353, 186606, 334706, 502059, 1004118, 1171471, 1506177, 2342942, 3012354, 3514413, 7028826, 10543239, 21086478]

約数ペア:

[(1, 21086478), (2, 10543239), (3, 7028826), (6, 3514413), (7, 3012354), (9, 2342942), (14, 1506177), (18, 1171471), (21, 1004118), (42, 502059), (63, 334706), (113, 186606), (126, 167353), (226, 93303), (339, 62202), (678, 31101), (791, 26658), (1017, 20734), (1481, 14238), (1582, 13329), (2034, 10367), (2373, 8886), (2962, 7119), (4443, 4746)]