20199784

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:202

約数の個数: 64

約数和(自身を含む): 43390080

約数和(自身を除く): 23190296

約数列:

[1, 2, 4, 8, 11, 22, 44, 53, 61, 71, 88, 106, 122, 142, 212, 244, 284, 424, 488, 568, 583, 671, 781, 1166, 1342, 1562, 2332, 2684, 3124, 3233, 3763, 4331, 4664, 5368, 6248, 6466, 7526, 8662, 12932, 15052, 17324, 25864, 30104, 34648, 35563, 41393, 47641, 71126, 82786, 95282, 142252, 165572, 190564, 229543, 284504, 331144, 381128, 459086, 918172, 1836344, 2524973, 5049946, 10099892, 20199784]

約数ペア:

[(1, 20199784), (2, 10099892), (4, 5049946), (8, 2524973), (11, 1836344), (22, 918172), (44, 459086), (53, 381128), (61, 331144), (71, 284504), (88, 229543), (106, 190564), (122, 165572), (142, 142252), (212, 95282), (244, 82786), (284, 71126), (424, 47641), (488, 41393), (568, 35563), (583, 34648), (671, 30104), (781, 25864), (1166, 17324), (1342, 15052), (1562, 12932), (2332, 8662), (2684, 7526), (3124, 6466), (3233, 6248), (3763, 5368), (4331, 4664)]