20811128

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24548872

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 79, 104, 136, 149, 158, 221, 298, 316, 442, 596, 632, 884, 1027, 1192, 1343, 1768, 1937, 2054, 2533, 2686, 3874, 4108, 5066, 5372, 7748, 8216, 10132, 10744, 11771, 15496, 17459, 20264, 23542, 32929, 34918, 47084, 65858, 69836, 94168, 131716, 139672, 153023, 200107, 263432, 306046, 400214, 612092, 800428, 1224184, 1600856, 2601391, 5202782, 10405564, 20811128]

約数ペア:

[(1, 20811128), (2, 10405564), (4, 5202782), (8, 2601391), (13, 1600856), (17, 1224184), (26, 800428), (34, 612092), (52, 400214), (68, 306046), (79, 263432), (104, 200107), (136, 153023), (149, 139672), (158, 131716), (221, 94168), (298, 69836), (316, 65858), (442, 47084), (596, 34918), (632, 32929), (884, 23542), (1027, 20264), (1192, 17459), (1343, 15496), (1768, 11771), (1937, 10744), (2054, 10132), (2533, 8216), (2686, 7748), (3874, 5372), (4108, 5066)]