21497060

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{929}}^1$

素因数の和:1040

約数の個数: 48

約数和(自身を含む): 49215600

約数和(自身を除く): 27718540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 890, 929, 1157, 1780, 1858, 2314, 3716, 4628, 4645, 5785, 9290, 11570, 12077, 18580, 23140, 24154, 48308, 60385, 82681, 120770, 165362, 241540, 330724, 413405, 826810, 1074853, 1653620, 2149706, 4299412, 5374265, 10748530, 21497060]

約数ペア:

[(1, 21497060), (2, 10748530), (4, 5374265), (5, 4299412), (10, 2149706), (13, 1653620), (20, 1074853), (26, 826810), (52, 413405), (65, 330724), (89, 241540), (130, 165362), (178, 120770), (260, 82681), (356, 60385), (445, 48308), (890, 24154), (929, 23140), (1157, 18580), (1780, 12077), (1858, 11570), (2314, 9290), (3716, 5785), (4628, 4645)]