19663917

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 36126720

約数和(自身を除く): 16462803

約数列:

[1, 3, 7, 13, 17, 19, 21, 39, 51, 57, 91, 119, 133, 221, 223, 247, 273, 323, 357, 399, 663, 669, 741, 969, 1547, 1561, 1729, 2261, 2899, 3791, 4199, 4237, 4641, 4683, 5187, 6783, 8697, 11373, 12597, 12711, 20293, 26537, 29393, 29659, 49283, 55081, 60879, 72029, 79611, 88179, 88977, 147849, 165243, 216087, 344981, 385567, 504203, 936377, 1034943, 1156701, 1512609, 2809131, 6554639, 19663917]

約数ペア:

[(1, 19663917), (3, 6554639), (7, 2809131), (13, 1512609), (17, 1156701), (19, 1034943), (21, 936377), (39, 504203), (51, 385567), (57, 344981), (91, 216087), (119, 165243), (133, 147849), (221, 88977), (223, 88179), (247, 79611), (273, 72029), (323, 60879), (357, 55081), (399, 49283), (663, 29659), (669, 29393), (741, 26537), (969, 20293), (1547, 12711), (1561, 12597), (1729, 11373), (2261, 8697), (2899, 6783), (3791, 5187), (4199, 4683), (4237, 4641)]