398897420

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{197}}^1\times {\mathrm{739}}^1$

素因数の和:1082

約数の個数: 48

約数和(自身を含む): 849229920

約数和(自身を除く): 450332500

約数列:

[1, 2, 4, 5, 10, 20, 137, 197, 274, 394, 548, 685, 739, 788, 985, 1370, 1478, 1970, 2740, 2956, 3695, 3940, 7390, 14780, 26989, 53978, 101243, 107956, 134945, 145583, 202486, 269890, 291166, 404972, 506215, 539780, 582332, 727915, 1012430, 1455830, 2024860, 2911660, 19944871, 39889742, 79779484, 99724355, 199448710, 398897420]

約数ペア:

[(1, 398897420), (2, 199448710), (4, 99724355), (5, 79779484), (10, 39889742), (20, 19944871), (137, 2911660), (197, 2024860), (274, 1455830), (394, 1012430), (548, 727915), (685, 582332), (739, 539780), (788, 506215), (985, 404972), (1370, 291166), (1478, 269890), (1970, 202486), (2740, 145583), (2956, 134945), (3695, 107956), (3940, 101243), (7390, 53978), (14780, 26989)]