28502120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{227}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 66813120

約数和(自身を除く): 38311000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 73, 86, 146, 172, 215, 227, 292, 344, 365, 430, 454, 584, 730, 860, 908, 1135, 1460, 1720, 1816, 2270, 2920, 3139, 4540, 6278, 9080, 9761, 12556, 15695, 16571, 19522, 25112, 31390, 33142, 39044, 48805, 62780, 66284, 78088, 82855, 97610, 125560, 132568, 165710, 195220, 331420, 390440, 662840, 712553, 1425106, 2850212, 3562765, 5700424, 7125530, 14251060, 28502120]

約数ペア:

[(1, 28502120), (2, 14251060), (4, 7125530), (5, 5700424), (8, 3562765), (10, 2850212), (20, 1425106), (40, 712553), (43, 662840), (73, 390440), (86, 331420), (146, 195220), (172, 165710), (215, 132568), (227, 125560), (292, 97610), (344, 82855), (365, 78088), (430, 66284), (454, 62780), (584, 48805), (730, 39044), (860, 33142), (908, 31390), (1135, 25112), (1460, 19522), (1720, 16571), (1816, 15695), (2270, 12556), (2920, 9761), (3139, 9080), (4540, 6278)]