21636820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{587}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 48404160

約数和(自身を除く): 26767340

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 587, 970, 1174, 1843, 1940, 2348, 2935, 3686, 5870, 7372, 9215, 11153, 11740, 18430, 22306, 36860, 44612, 55765, 56939, 111530, 113878, 223060, 227756, 284695, 569390, 1081841, 1138780, 2163682, 4327364, 5409205, 10818410, 21636820]

約数ペア:

[(1, 21636820), (2, 10818410), (4, 5409205), (5, 4327364), (10, 2163682), (19, 1138780), (20, 1081841), (38, 569390), (76, 284695), (95, 227756), (97, 223060), (190, 113878), (194, 111530), (380, 56939), (388, 55765), (485, 44612), (587, 36860), (970, 22306), (1174, 18430), (1843, 11740), (1940, 11153), (2348, 9215), (2935, 7372), (3686, 5870)]