19960040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:374

約数の個数: 64

約数和(自身を含む): 48114000

約数和(自身を除く): 28153960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 149, 170, 197, 298, 340, 394, 596, 680, 745, 788, 985, 1192, 1490, 1576, 1970, 2533, 2980, 3349, 3940, 5066, 5960, 6698, 7880, 10132, 12665, 13396, 16745, 20264, 25330, 26792, 29353, 33490, 50660, 58706, 66980, 101320, 117412, 133960, 146765, 234824, 293530, 499001, 587060, 998002, 1174120, 1996004, 2495005, 3992008, 4990010, 9980020, 19960040]

約数ペア:

[(1, 19960040), (2, 9980020), (4, 4990010), (5, 3992008), (8, 2495005), (10, 1996004), (17, 1174120), (20, 998002), (34, 587060), (40, 499001), (68, 293530), (85, 234824), (136, 146765), (149, 133960), (170, 117412), (197, 101320), (298, 66980), (340, 58706), (394, 50660), (596, 33490), (680, 29353), (745, 26792), (788, 25330), (985, 20264), (1192, 16745), (1490, 13396), (1576, 12665), (1970, 10132), (2533, 7880), (2980, 6698), (3349, 5960), (3940, 5066)]