28920340

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 62375040

約数和(自身を除く): 33454700

約数列:

[1, 2, 4, 5, 10, 20, 101, 103, 139, 202, 206, 278, 404, 412, 505, 515, 556, 695, 1010, 1030, 1390, 2020, 2060, 2780, 10403, 14039, 14317, 20806, 28078, 28634, 41612, 52015, 56156, 57268, 70195, 71585, 104030, 140390, 143170, 208060, 280780, 286340, 1446017, 2892034, 5784068, 7230085, 14460170, 28920340]

約数ペア:

[(1, 28920340), (2, 14460170), (4, 7230085), (5, 5784068), (10, 2892034), (20, 1446017), (101, 286340), (103, 280780), (139, 208060), (202, 143170), (206, 140390), (278, 104030), (404, 71585), (412, 70195), (505, 57268), (515, 56156), (556, 52015), (695, 41612), (1010, 28634), (1030, 28078), (1390, 20806), (2020, 14317), (2060, 14039), (2780, 10403)]