21835480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 52604640

約数和(自身を除く): 30769160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 163, 170, 197, 326, 340, 394, 652, 680, 788, 815, 985, 1304, 1576, 1630, 1970, 2771, 3260, 3349, 3940, 5542, 6520, 6698, 7880, 11084, 13396, 13855, 16745, 22168, 26792, 27710, 32111, 33490, 55420, 64222, 66980, 110840, 128444, 133960, 160555, 256888, 321110, 545887, 642220, 1091774, 1284440, 2183548, 2729435, 4367096, 5458870, 10917740, 21835480]

約数ペア:

[(1, 21835480), (2, 10917740), (4, 5458870), (5, 4367096), (8, 2729435), (10, 2183548), (17, 1284440), (20, 1091774), (34, 642220), (40, 545887), (68, 321110), (85, 256888), (136, 160555), (163, 133960), (170, 128444), (197, 110840), (326, 66980), (340, 64222), (394, 55420), (652, 33490), (680, 32111), (788, 27710), (815, 26792), (985, 22168), (1304, 16745), (1576, 13855), (1630, 13396), (1970, 11084), (2771, 7880), (3260, 6698), (3349, 6520), (3940, 5542)]