19901168

素因数分解:

$2^4\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1297}}^1$

素因数の和:1449

約数の個数: 40

約数和(自身を含む): 44422752

約数和(自身を除く): 24521584

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 137, 274, 548, 959, 1096, 1297, 1918, 2192, 2594, 3836, 5188, 7672, 9079, 10376, 15344, 18158, 20752, 36316, 72632, 145264, 177689, 355378, 710756, 1243823, 1421512, 2487646, 2843024, 4975292, 9950584, 19901168]

約数ペア:

[(1, 19901168), (2, 9950584), (4, 4975292), (7, 2843024), (8, 2487646), (14, 1421512), (16, 1243823), (28, 710756), (56, 355378), (112, 177689), (137, 145264), (274, 72632), (548, 36316), (959, 20752), (1096, 18158), (1297, 15344), (1918, 10376), (2192, 9079), (2594, 7672), (3836, 5188)]