31531720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71663}}^1$

素因数の和:71685

約数の個数: 32

約数和(自身を含む): 77397120

約数和(自身を除く): 45865400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 71663, 143326, 286652, 358315, 573304, 716630, 788293, 1433260, 1576586, 2866520, 3153172, 3941465, 6306344, 7882930, 15765860, 31531720]

約数ペア:

[(1, 31531720), (2, 15765860), (4, 7882930), (5, 6306344), (8, 3941465), (10, 3153172), (11, 2866520), (20, 1576586), (22, 1433260), (40, 788293), (44, 716630), (55, 573304), (88, 358315), (110, 286652), (220, 143326), (440, 71663)]