28778120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1301}}^1$

素因数の和:1398

約数の個数: 64

約数和(自身を含む): 74995200

約数和(自身を除く): 46217080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 1106, 1301, 1580, 2212, 2602, 2765, 3160, 4424, 5204, 5530, 6505, 9107, 10408, 11060, 13010, 18214, 22120, 26020, 36428, 45535, 52040, 72856, 91070, 102779, 182140, 205558, 364280, 411116, 513895, 719453, 822232, 1027790, 1438906, 2055580, 2877812, 3597265, 4111160, 5755624, 7194530, 14389060, 28778120]

約数ペア:

[(1, 28778120), (2, 14389060), (4, 7194530), (5, 5755624), (7, 4111160), (8, 3597265), (10, 2877812), (14, 2055580), (20, 1438906), (28, 1027790), (35, 822232), (40, 719453), (56, 513895), (70, 411116), (79, 364280), (140, 205558), (158, 182140), (280, 102779), (316, 91070), (395, 72856), (553, 52040), (632, 45535), (790, 36428), (1106, 26020), (1301, 22120), (1580, 18214), (2212, 13010), (2602, 11060), (2765, 10408), (3160, 9107), (4424, 6505), (5204, 5530)]