21971495

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1123}}^1$

素因数の和:1191

約数の個数: 32

約数和(自身を含む): 33234432

約数和(自身を除く): 11262937

約数列:

[1, 5, 7, 13, 35, 43, 65, 91, 215, 301, 455, 559, 1123, 1505, 2795, 3913, 5615, 7861, 14599, 19565, 39305, 48289, 72995, 102193, 241445, 338023, 510965, 627757, 1690115, 3138785, 4394299, 21971495]

約数ペア:

[(1, 21971495), (5, 4394299), (7, 3138785), (13, 1690115), (35, 627757), (43, 510965), (65, 338023), (91, 241445), (215, 102193), (301, 72995), (455, 48289), (559, 39305), (1123, 19565), (1505, 14599), (2795, 7861), (3913, 5615)]