21216710

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{769}}^1$

素因数の和:896

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18700090

約数列:

[1, 2, 5, 10, 31, 62, 89, 155, 178, 310, 445, 769, 890, 1538, 2759, 3845, 5518, 7690, 13795, 23839, 27590, 47678, 68441, 119195, 136882, 238390, 342205, 684410, 2121671, 4243342, 10608355, 21216710]

約数ペア:

[(1, 21216710), (2, 10608355), (5, 4243342), (10, 2121671), (31, 684410), (62, 342205), (89, 238390), (155, 136882), (178, 119195), (310, 68441), (445, 47678), (769, 27590), (890, 23839), (1538, 13795), (2759, 7690), (3845, 5518)]