21649784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{2339}}^1$

素因数の和:2447

約数の個数: 32

約数和(自身を含む): 44226000

約数和(自身を除く): 22576216

約数列:

[1, 2, 4, 8, 13, 26, 52, 89, 104, 178, 356, 712, 1157, 2314, 2339, 4628, 4678, 9256, 9356, 18712, 30407, 60814, 121628, 208171, 243256, 416342, 832684, 1665368, 2706223, 5412446, 10824892, 21649784]

約数ペア:

[(1, 21649784), (2, 10824892), (4, 5412446), (8, 2706223), (13, 1665368), (26, 832684), (52, 416342), (89, 243256), (104, 208171), (178, 121628), (356, 60814), (712, 30407), (1157, 18712), (2314, 9356), (2339, 9256), (4628, 4678)]