21057687

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4231}}^1$

素因数の和:4323

約数の個数: 24

約数和(自身を含む): 35210240

約数和(自身を除く): 14152553

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4231, 4977, 12693, 29617, 38079, 88851, 266553, 334249, 1002747, 2339743, 3008241, 7019229, 21057687]

約数ペア:

[(1, 21057687), (3, 7019229), (7, 3008241), (9, 2339743), (21, 1002747), (63, 334249), (79, 266553), (237, 88851), (553, 38079), (711, 29617), (1659, 12693), (4231, 4977)]