20027999720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1\times {\mathrm{67181}}^1$

素因数の和:67478

約数の個数: 64

約数和(自身を含む): 46798981200

約数和(自身を除く): 26770981480

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 257, 290, 514, 580, 1028, 1160, 1285, 2056, 2570, 5140, 7453, 10280, 14906, 29812, 37265, 59624, 67181, 74530, 134362, 149060, 268724, 298120, 335905, 537448, 671810, 1343620, 1948249, 2687240, 3896498, 7792996, 9741245, 15585992, 17265517, 19482490, 34531034, 38964980, 69062068, 77929960, 86327585, 138124136, 172655170, 345310340, 500699993, 690620680, 1001399986, 2002799972, 2503499965, 4005599944, 5006999930, 10013999860, 20027999720]

約数ペア:

[(1, 20027999720), (2, 10013999860), (4, 5006999930), (5, 4005599944), (8, 2503499965), (10, 2002799972), (20, 1001399986), (29, 690620680), (40, 500699993), (58, 345310340), (116, 172655170), (145, 138124136), (232, 86327585), (257, 77929960), (290, 69062068), (514, 38964980), (580, 34531034), (1028, 19482490), (1160, 17265517), (1285, 15585992), (2056, 9741245), (2570, 7792996), (5140, 3896498), (7453, 2687240), (10280, 1948249), (14906, 1343620), (29812, 671810), (37265, 537448), (59624, 335905), (67181, 298120), (74530, 268724), (134362, 149060)]