257819705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{21211}}^1$

素因数の和:21257

約数の個数: 32

約数和(自身を含む): 384870528

約数和(自身を除く): 127050823

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 143, 187, 221, 715, 935, 1105, 2431, 12155, 21211, 106055, 233321, 275743, 360587, 1166605, 1378715, 1802935, 3033173, 3966457, 4687631, 15165865, 19832285, 23438155, 51563941, 257819705]

約数ペア:

[(1, 257819705), (5, 51563941), (11, 23438155), (13, 19832285), (17, 15165865), (55, 4687631), (65, 3966457), (85, 3033173), (143, 1802935), (187, 1378715), (221, 1166605), (715, 360587), (935, 275743), (1105, 233321), (2431, 106055), (12155, 21211)]