21167120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20353}}^1$

素因数の和:20379

約数の個数: 40

約数和(自身を含む): 53001816

約数和(自身を除く): 31834696

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20353, 40706, 81412, 101765, 162824, 203530, 264589, 325648, 407060, 529178, 814120, 1058356, 1322945, 1628240, 2116712, 2645890, 4233424, 5291780, 10583560, 21167120]

約数ペア:

[(1, 21167120), (2, 10583560), (4, 5291780), (5, 4233424), (8, 2645890), (10, 2116712), (13, 1628240), (16, 1322945), (20, 1058356), (26, 814120), (40, 529178), (52, 407060), (65, 325648), (80, 264589), (104, 203530), (130, 162824), (208, 101765), (260, 81412), (520, 40706), (1040, 20353)]