18939856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:188

約数の個数: 80

約数和(自身を含む): 42747264

約数和(自身を除く): 23807408

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 37, 46, 52, 74, 92, 104, 107, 148, 184, 208, 214, 296, 299, 368, 428, 481, 592, 598, 851, 856, 962, 1196, 1391, 1702, 1712, 1924, 2392, 2461, 2782, 3404, 3848, 3959, 4784, 4922, 5564, 6808, 7696, 7918, 9844, 11063, 11128, 13616, 15836, 19688, 22126, 22256, 31672, 31993, 39376, 44252, 51467, 63344, 63986, 88504, 91057, 102934, 127972, 177008, 182114, 205868, 255944, 364228, 411736, 511888, 728456, 823472, 1183741, 1456912, 2367482, 4734964, 9469928, 18939856]

約数ペア:

[(1, 18939856), (2, 9469928), (4, 4734964), (8, 2367482), (13, 1456912), (16, 1183741), (23, 823472), (26, 728456), (37, 511888), (46, 411736), (52, 364228), (74, 255944), (92, 205868), (104, 182114), (107, 177008), (148, 127972), (184, 102934), (208, 91057), (214, 88504), (296, 63986), (299, 63344), (368, 51467), (428, 44252), (481, 39376), (592, 31993), (598, 31672), (851, 22256), (856, 22126), (962, 19688), (1196, 15836), (1391, 13616), (1702, 11128), (1712, 11063), (1924, 9844), (2392, 7918), (2461, 7696), (2782, 6808), (3404, 5564), (3848, 4922), (3959, 4784)]