21306440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31333}}^1$

素因数の和:31361

約数の個数: 32

約数和(自身を含む): 50761080

約数和(自身を除く): 29454640

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31333, 62666, 125332, 156665, 250664, 313330, 532661, 626660, 1065322, 1253320, 2130644, 2663305, 4261288, 5326610, 10653220, 21306440]

約数ペア:

[(1, 21306440), (2, 10653220), (4, 5326610), (5, 4261288), (8, 2663305), (10, 2130644), (17, 1253320), (20, 1065322), (34, 626660), (40, 532661), (68, 313330), (85, 250664), (136, 156665), (170, 125332), (340, 62666), (680, 31333)]