21359288

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{131}}^1\times {\mathrm{229}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 40986000

約数和(自身を除く): 19626712

約数列:

[1, 2, 4, 8, 89, 131, 178, 229, 262, 356, 458, 524, 712, 916, 1048, 1832, 11659, 20381, 23318, 29999, 40762, 46636, 59998, 81524, 93272, 119996, 163048, 239992, 2669911, 5339822, 10679644, 21359288]

約数ペア:

[(1, 21359288), (2, 10679644), (4, 5339822), (8, 2669911), (89, 239992), (131, 163048), (178, 119996), (229, 93272), (262, 81524), (356, 59998), (458, 46636), (524, 40762), (712, 29999), (916, 23318), (1048, 20381), (1832, 11659)]