21639784

素因数分解:

$2^3\times {\mathrm{19}}^2\times {\mathrm{59}}^1\times {\mathrm{127}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 43891200

約数和(自身を除く): 22251416

約数列:

[1, 2, 4, 8, 19, 38, 59, 76, 118, 127, 152, 236, 254, 361, 472, 508, 722, 1016, 1121, 1444, 2242, 2413, 2888, 4484, 4826, 7493, 8968, 9652, 14986, 19304, 21299, 29972, 42598, 45847, 59944, 85196, 91694, 142367, 170392, 183388, 284734, 366776, 569468, 1138936, 2704973, 5409946, 10819892, 21639784]

約数ペア:

[(1, 21639784), (2, 10819892), (4, 5409946), (8, 2704973), (19, 1138936), (38, 569468), (59, 366776), (76, 284734), (118, 183388), (127, 170392), (152, 142367), (236, 91694), (254, 85196), (361, 59944), (472, 45847), (508, 42598), (722, 29972), (1016, 21299), (1121, 19304), (1444, 14986), (2242, 9652), (2413, 8968), (2888, 7493), (4484, 4826)]