31557309

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{569}}^1$

素因数の和:737

約数の個数: 32

約数和(自身を含む): 51072000

約数和(自身を除く): 19514691

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 399, 417, 569, 973, 1707, 2641, 2919, 3983, 7923, 10811, 11949, 18487, 32433, 55461, 75677, 79091, 227031, 237273, 553637, 1502729, 1660911, 4508187, 10519103, 31557309]

約数ペア:

[(1, 31557309), (3, 10519103), (7, 4508187), (19, 1660911), (21, 1502729), (57, 553637), (133, 237273), (139, 227031), (399, 79091), (417, 75677), (569, 55461), (973, 32433), (1707, 18487), (2641, 11949), (2919, 10811), (3983, 7923)]