19721972

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 38601360

約数和(自身を除く): 18879388

約数列:

[1, 2, 4, 17, 29, 34, 58, 68, 73, 116, 137, 146, 274, 292, 493, 548, 986, 1241, 1972, 2117, 2329, 2482, 3973, 4234, 4658, 4964, 7946, 8468, 9316, 10001, 15892, 20002, 35989, 40004, 67541, 71978, 135082, 143956, 170017, 270164, 290029, 340034, 580058, 680068, 1160116, 4930493, 9860986, 19721972]

約数ペア:

[(1, 19721972), (2, 9860986), (4, 4930493), (17, 1160116), (29, 680068), (34, 580058), (58, 340034), (68, 290029), (73, 270164), (116, 170017), (137, 143956), (146, 135082), (274, 71978), (292, 67541), (493, 40004), (548, 35989), (986, 20002), (1241, 15892), (1972, 10001), (2117, 9316), (2329, 8468), (2482, 7946), (3973, 4964), (4234, 4658)]