217984415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{1511}}^1$

素因数の和:1631

約数の個数: 32

約数和(自身を含む): 296980992

約数和(自身を除く): 78996577

約数列:

[1, 5, 11, 43, 55, 61, 215, 305, 473, 671, 1511, 2365, 2623, 3355, 7555, 13115, 16621, 28853, 64973, 83105, 92171, 144265, 324865, 460855, 714703, 1013881, 3573515, 3963353, 5069405, 19816765, 43596883, 217984415]

約数ペア:

[(1, 217984415), (5, 43596883), (11, 19816765), (43, 5069405), (55, 3963353), (61, 3573515), (215, 1013881), (305, 714703), (473, 460855), (671, 324865), (1511, 144265), (2365, 92171), (2623, 83105), (3355, 64973), (7555, 28853), (13115, 16621)]