205398650

素因数分解:

$2^1\times 5^2\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{457}}^1$

素因数の和:659

約数の個数: 48

約数和(自身を含む): 391012920

約数和(自身を除く): 185614270

約数列:

[1, 2, 5, 10, 25, 50, 89, 101, 178, 202, 445, 457, 505, 890, 914, 1010, 2225, 2285, 2525, 4450, 4570, 5050, 8989, 11425, 17978, 22850, 40673, 44945, 46157, 81346, 89890, 92314, 203365, 224725, 230785, 406730, 449450, 461570, 1016825, 1153925, 2033650, 2307850, 4107973, 8215946, 20539865, 41079730, 102699325, 205398650]

約数ペア:

[(1, 205398650), (2, 102699325), (5, 41079730), (10, 20539865), (25, 8215946), (50, 4107973), (89, 2307850), (101, 2033650), (178, 1153925), (202, 1016825), (445, 461570), (457, 449450), (505, 406730), (890, 230785), (914, 224725), (1010, 203365), (2225, 92314), (2285, 89890), (2525, 81346), (4450, 46157), (4570, 44945), (5050, 40673), (8989, 22850), (11425, 17978)]