21258095

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 28200960

約数和(自身を除く): 6942865

約数列:

[1, 5, 23, 31, 67, 89, 115, 155, 335, 445, 713, 1541, 2047, 2077, 2759, 3565, 5963, 7705, 10235, 10385, 13795, 29815, 47771, 63457, 137149, 184853, 238855, 317285, 685745, 924265, 4251619, 21258095]

約数ペア:

[(1, 21258095), (5, 4251619), (23, 924265), (31, 685745), (67, 317285), (89, 238855), (115, 184853), (155, 137149), (335, 63457), (445, 47771), (713, 29815), (1541, 13795), (2047, 10385), (2077, 10235), (2759, 7705), (3565, 5963)]