21070990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{317}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 42174432

約数和(自身を除く): 21103442

約数列:

[1, 2, 5, 10, 17, 23, 34, 46, 85, 115, 170, 230, 289, 317, 391, 578, 634, 782, 1445, 1585, 1955, 2890, 3170, 3910, 5389, 6647, 7291, 10778, 13294, 14582, 26945, 33235, 36455, 53890, 66470, 72910, 91613, 123947, 183226, 247894, 458065, 619735, 916130, 1239470, 2107099, 4214198, 10535495, 21070990]

約数ペア:

[(1, 21070990), (2, 10535495), (5, 4214198), (10, 2107099), (17, 1239470), (23, 916130), (34, 619735), (46, 458065), (85, 247894), (115, 183226), (170, 123947), (230, 91613), (289, 72910), (317, 66470), (391, 53890), (578, 36455), (634, 33235), (782, 26945), (1445, 14582), (1585, 13294), (1955, 10778), (2890, 7291), (3170, 6647), (3910, 5389)]