21497180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2749}}^1$

素因数の和:2798

約数の個数: 48

約数和(自身を含む): 49896000

約数和(自身を除く): 28398820

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 34, 46, 68, 85, 92, 115, 170, 230, 340, 391, 460, 782, 1564, 1955, 2749, 3910, 5498, 7820, 10996, 13745, 27490, 46733, 54980, 63227, 93466, 126454, 186932, 233665, 252908, 316135, 467330, 632270, 934660, 1074859, 1264540, 2149718, 4299436, 5374295, 10748590, 21497180]

約数ペア:

[(1, 21497180), (2, 10748590), (4, 5374295), (5, 4299436), (10, 2149718), (17, 1264540), (20, 1074859), (23, 934660), (34, 632270), (46, 467330), (68, 316135), (85, 252908), (92, 233665), (115, 186932), (170, 126454), (230, 93466), (340, 63227), (391, 54980), (460, 46733), (782, 27490), (1564, 13745), (1955, 10996), (2749, 7820), (3910, 5498)]